Feature/multipart serialization

.github/CODEOWNERS

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+* @microsoft/kiota-write

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a report to help us improve
+title: ""
+labels: bug
+---
+
+**Environment**
+
+- Python Version
+- kiota-serialization-multipart version:
+- OS:
+
+**Stack trace (if available)**
+Screenshot or `formatted` copy and paste of your stack trace.
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**To Reproduce**
+Steps to reproduce the behavior:
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Screenshots**
+If applicable, add screenshots to help explain your problem.
+
+**Additional context**
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Suggest a feature for this project
+title: ''
+labels: enhancement
+assignees: ''
+
+---
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.

.github/dependabot.yml

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+version: 2
+updates:
+- package-ecosystem: pip
+  directory: "/"
+  schedule:
+    interval: daily
+  open-pull-requests-limit: 10
+- package-ecosystem: github-actions
+  directory: "/"
+  schedule:
+    interval: daily
+  open-pull-requests-limit: 10

.github/policies/resourceManagement.yml

@@ -0,0 +1,101 @@
+id: 
+name: GitOps.PullRequestIssueManagement
+description: GitOps.PullRequestIssueManagement primitive
+owner: 
+resource: repository
+disabled: false
+where: 
+configuration:
+  resourceManagementConfiguration:
+    scheduledSearches:
+    - description: 
+      frequencies:
+      - hourly:
+          hour: 6
+      filters:
+      - isIssue
+      - isOpen
+      - hasLabel:
+          label: 'Needs: Author Feedback'
+      - hasLabel:
+          label: 'Status: No Recent Activity'
+      - noActivitySince:
+          days: 3
+      actions:
+      - closeIssue
+    - description: 
+      frequencies:
+      - hourly:
+          hour: 6
+      filters:
+      - isIssue
+      - isOpen
+      - hasLabel:
+          label: 'Needs: Author Feedback'
+      - noActivitySince:
+          days: 4
+      - isNotLabeledWith:
+          label: 'Status: No Recent Activity'
+      actions:
+      - addLabel:
+          label: 'Status: No Recent Activity'
+      - addReply:
+          reply: This issue has been automatically marked as stale because it has been marked as requiring author feedback but has not had any activity for **4 days**. It will be closed if no further activity occurs **within 3 days of this comment**.
+    - description: 
+      frequencies:
+      - hourly:
+          hour: 6
+      filters:
+      - isIssue
+      - isOpen
+      - hasLabel:
+          label: 'Resolution: Duplicate'
+      - noActivitySince:
+          days: 1
+      actions:
+      - addReply:
+          reply: This issue has been marked as duplicate and has not had any activity for **1 day**. It will be closed for housekeeping purposes.
+      - closeIssue
+    eventResponderTasks:
+    - if:
+      - payloadType: Issue_Comment
+      - isAction:
+          action: Created
+      - isActivitySender:
+          issueAuthor: True
+      - hasLabel:
+          label: 'Needs: Author Feedback'
+      - isOpen
+      then:
+      - addLabel:
+          label: 'Needs: Attention :wave:'
+      - removeLabel:
+          label: 'Needs: Author Feedback'
+      description: 
+    - if:
+      - payloadType: Issues
+      - not:
+          isAction:
+            action: Closed
+      - hasLabel:
+          label: 'Status: No Recent Activity'
+      then:
+      - removeLabel:
+          label: 'Status: No Recent Activity'
+      description: 
+    - if:
+      - payloadType: Issue_Comment
+      - hasLabel:
+          label: 'Status: No Recent Activity'
+      then:
+      - removeLabel:
+          label: 'Status: No Recent Activity'
+      description: 
+    - if:
+      - payloadType: Pull_Request
+      then:
+      - inPrLabel:
+          label: WIP
+      description: 
+onFailure: 
+onSuccess: 

.github/pull_request_template.md

@@ -0,0 +1,23 @@
+## Overview
+
+Brief description of what this PR does, and why it is needed.
+
+## Related Issue
+
+Fixes # (issue)
+
+### Demo
+
+Optional. Screenshots, `curl` examples, etc.
+
+### Notes
+
+Optional. Ancillary topics, caveats, alternative strategies that didn't work out, anything else.
+
+## Testing Instructions
+
+* How to test this PR
+* Prefer bulleted description
+* Start after checking out this branch
+* Include any setup required, such as bundling scripts, restarting services, etc.
+* Include test case, and expected output

.github/workflows/auto-merge-dependabot.yml

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+name: Auto-merge dependabot updates
+
+on:
+  pull_request:
+    branches: [ main ]
+
+permissions:
+  pull-requests: write
+  contents: write
+
+jobs:
+
+  dependabot-merge:
+
+    runs-on: ubuntu-latest
+
+    if: ${{ github.actor == 'dependabot[bot]' }}
+
+    steps:
+      - name: Dependabot metadata
+        id: metadata
+        uses: dependabot/fetch-metadata@v1.6.0
+        with:
+          github-token: "${{ secrets.GITHUB_TOKEN }}"
+
+      - name: Enable auto-merge for Dependabot PRs
+        # Only if version bump is not a major version change
+        if: ${{steps.metadata.outputs.update-type != 'version-update:semver-major'}}
+        run: gh pr merge --auto --merge "$PR_URL"
+        env:
+          PR_URL: ${{github.event.pull_request.html_url}}
+          GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}

.github/workflows/build.yml

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+name: Python Serialization Multipart
+
+on:
+  workflow_dispatch:
+  workflow_call:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -r requirements-dev.txt
+      - name: Check code format
+        run: |
+          yapf -dr kiota_serialization_multipart
+      - name: Check import order
+        run: |
+          isort kiota_serialization_multipart
+      - name: Lint with Pylint
+        run: |
+          pylint kiota_serialization_multipart --disable=W --rcfile=.pylintrc
+      - name: Static type checking with Mypy
+        run: |
+          mypy kiota_serialization_multipart
+      - name: Run tests with Pytest
+        run: |
+          pytest

.github/workflows/codeql-analysis.yml

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+# For most projects, this workflow file will not need changing; you simply need
+# to commit it to your repository.
+#
+# You may wish to alter this file to override the set of languages analyzed,
+# or to provide custom queries or build logic.
+#
+# ******** NOTE ********
+# We have attempted to detect the languages in your repository. Please check
+# the `language` matrix defined below to confirm you have the correct set of
+# supported CodeQL languages.
+#
+name: "CodeQL"
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    # The branches below must be a subset of the branches above
+    branches: [ "main" ]
+  schedule:
+    - cron: '41 19 * * 0'
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [ 'python' ]
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v4
+
+    # Initializes the CodeQL tools for scanning.
+    - name: Initialize CodeQL
+      uses: github/codeql-action/init@v3
+      with:
+        languages: ${{ matrix.language }}
+        # If you wish to specify custom queries, you can do so here or in a config file.
+        # By default, queries listed here will override any specified in a config file.
+        # Prefix the list here with "+" to use these queries and those in the config file.
+
+        # Details on CodeQL's query packs refer to : https://docs.github.com/en/code-security/code-scanning/automatically-scanning-your-code-for-vulnerabilities-and-errors/configuring-code-scanning#using-queries-in-ql-packs
+        # queries: security-extended,security-and-quality
+
+
+    # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
+    # If this step fails, then you should remove it and run the build manually (see below)
+    - name: Autobuild
+      uses: github/codeql-action/autobuild@v3
+
+    # ℹ️ Command-line programs to run using the OS shell.
+    # 📚 See https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#jobsjob_idstepsrun
+
+    #   If the Autobuild fails above, remove it and uncomment the following three lines. 
+    #   modify them (or add more) to build your code if your project, please refer to the EXAMPLE below for guidance.
+
+    # - run: |
+    #   echo "Run, Build Application using script"
+    #   ./location_of_script_within_repo/buildscript.sh
+
+    - name: Perform CodeQL Analysis
+      uses: github/codeql-action/analyze@v3

.github/workflows/conflicting-pr-label.yml

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+# This is a basic workflow to help you get started with Actions
+
+name: PullRequestConflicting
+
+# Controls when the action will run. Triggers the workflow on push or pull request
+# events but only for the master branch
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    types: [synchronize]
+    branches: [ main ]
+
+permissions:
+  pull-requests: write
+  contents: read
+
+# A workflow run is made up of one or more jobs that can run sequentially or in parallel
+jobs:
+  # This workflow contains a single job called "build"
+  build:
+    # The type of runner that the job will run on
+    runs-on: ubuntu-latest
+
+    # Steps represent a sequence of tasks that will be executed as part of the job
+    steps:
+    - name: check if prs are dirty
+      uses: eps1lon/actions-label-merge-conflict@releases/2.x
+      if: env.LABELING_TOKEN != '' && env.LABELING_TOKEN != null
+      id: check
+      with:
+        dirtyLabel: "conflicting"
+        repoToken: "${{ secrets.GITHUB_TOKEN  }}"
+        continueOnMissingPermissions: true
+        commentOnDirty: 'This pull request has conflicting changes, the author must resolve the conflicts before this pull request can be merged.'
+        commentOnClean: 'Conflicts have been resolved. A maintainer will take a look shortly.'
+      env:
+        LABELING_TOKEN: ${{secrets.GITHUB_TOKEN }}