feat: housekeeping (cosmos#905)

Part of EPIC celestiaorg/devops#112

> Note: Before merging this the secrets `ADD_TO_PROJECT_PAT` and
`PAT_FOR_AUTO_REQUEST_REVIEW` are needed to set. See the usage and
explanation
[here](https://github.com/celestiaorg/.github/blob/v0.1.1/.github/workflows/reusable_housekeeping.yml).

Changes in the PR:

- The `.github/dependabot.yml` file is updated to add `T:dependencies`
label for dependency updates in both package ecosystems.
- A new `.github/workflows/housekeeping.yml` file is created to automate
issue and PR housekeeping tasks, such as adding issues and PRs to a
project, adding grooming labels, automatically assigning reviewers,
assigning issues and PRs to their creators, and requiring specific
labels.
- A new `.github/auto_request_review.yml` file is created to configure
the automatic assignment of reviewers based on file changes and reviewer
groups.
<details>
<summary>Reviwer rules</summary>

- `code-owners` group includes:
  - Nashqueue
  - tzdybal
  - gupadhyaya

- `rollkit` group includes:
  - Manav-Aggarwal
  - S1nus
  - tuxcanfly

- `devops` group includes:
  - smuu
  - sysrex
  - jrmanes
  - Bidon15

- `celestia` group includes the `team:celestia` team.

The file patterns and the associated reviewer groups are:

- For any file (`**`), the `code-owners` and `rollkit` groups will be
requested for review.
- For any Dockerfile (`**/*Dockerfile`), the `devops` group will be
requested for review.
- For any file within the `.github` directory and its subdirectories
(`.github/**`), the `devops` group will be requested for review.

The options section specifies that draft PRs will be ignored
(`ignore_draft: true`), PRs with "WIP" in the title will be ignored
(`ignored_keywords: - WIP`), and the number of reviewers to request is 3
(`number_of_reviewers: 3`).
</details>

Closes celestiaorg/devops#260

---------

Signed-off-by: Smuu <18609909+Smuu@users.noreply.github.com>

.github/auto_request_review.yml

@@ -0,0 +1,32 @@
+reviewers:
+  defaults:
+    - code-owners
+  groups:
+    code-owners:
+      - Nashqueue
+      - tzdybal
+      - gupadhyaya
+    rollkit:
+      - Manav-Aggarwal
+      - S1nus
+      - tuxcanfly
+    devops:
+      - smuu
+      - sysrex
+      - jrmanes
+      - Bidon15
+    celestia:
+      - team:celestia
+files:
+  '**':
+    - code-owners
+    - rollkit
+  '**/*Dockerfile':
+    - devops
+  '.github/**':
+    - devops
+options:
+  ignore_draft: true
+  ignored_keywords:
+    - WIP
+  number_of_reviewers: 3

.github/dependabot.yml

@@ -5,6 +5,8 @@ updates:
     schedule:
       interval: daily
     open-pull-requests-limit: 10
+    labels:
+      - T:dependencies
   - package-ecosystem: gomod
     directory: "/"
     schedule:
@@ -17,3 +19,5 @@ updates:
     schedule:
       interval: weekly
     open-pull-requests-limit: 10
+    labels:
+      - T:dependencies

.github/workflows/housekeeping.yml

@@ -0,0 +1,71 @@
+name: Housekeeping
+
+on:
+  issues:
+    types: [opened]
+  pull_request_target:
+    types: [opened]
+
+jobs:
+  project:
+    name: Add issues and PRs to project and add grooming label
+    uses: celestiaorg/.github/.github/workflows/reusable_housekeeping.yml@v0.1.1
+    secrets: inherit
+    permissions:
+      issues: write
+      pull-requests: write
+    with:
+      run-labels: true
+      labels-to-add: 'needs-grooming'
+      run-projects: true
+      project-url: https://github.com/orgs/rollkit/projects/7
+
+  auto-add-reviewer:
+    name: Auto add reviewer to PR
+    if: github.event.pull_request
+    uses: celestiaorg/.github/.github/workflows/reusable_housekeeping.yml@v0.1.1
+    secrets: inherit
+    permissions:
+      issues: write
+      pull-requests: write
+    with:
+      run-auto-request-review: true
+
+  auto-add-assignee:
+    name: Assign issue and PR to creator
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+      pull-requests: write
+    steps:
+      - name: Set issue url and creator login
+        if: ${{ github.event.issue }}
+        run: |
+          echo "ISSUE=${{ github.event.issue.html_url }}" >> $GITHUB_ENV
+          echo "CREATOR=${{ github.event.issue.user.login }}" >> $GITHUB_ENV
+      - name: Set pull_request url and creator login
+        if: ${{ github.event.pull_request }}
+        # yamllint disable rule:line-length
+        run: |
+          echo "PR=${{ github.event.pull_request.html_url }}" >> $GITHUB_ENV
+          echo "CREATOR=${{ github.event.pull_request.user.login }}" >> $GITHUB_ENV
+        # yamllint enable rule:line-length
+      - name: Assign issue to creator (issue)
+        if: ${{ github.event.issue }}
+        run: gh issue edit ${{ env.ISSUE }} --add-assignee ${{ env.CREATOR }}
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      - name: Assign issue to creator (PR)
+        if: ${{ github.event.pull_request }}
+        run: gh pr edit ${{ env.PR }} --add-assignee ${{ env.CREATOR }}
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+  required-labels:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: mheap/github-action-required-labels@v4
+        with:
+          mode: minimum
+          count: 1
+          labels: "T:enhancement, T:documentation, T:code-hygiene, T:bug, T:adr, T:sdk, T:testing, T:question, T:dependencies, T:spec-and-docs, T:da-integration, T:dev-usability-and-ux" # yamllint disable-line rule:line-length