feat: add github actions

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: If you find an issue, please let us know.
+title: ''
+labels: ''
+---
+
+<!--
+Thank you in advance for helping us to improve Berjis!
+
+Please read through the template below and answer all relevant questions.
+Your additional work here is greatly appreciated and will help us respond as quickly as possible.
+-->
+
+## Description
+
+> Provide a clear and concise description of the issue, including what you expected to happen.
+
+### How To Reproduce
+
+> Detail the steps taken to reproduce this error, and whether this issue can be reproduced consistently or if it is intermittent.
+
+### What Happened
+
+> What actually happened including any error log or so
+
+### Expected Behavior
+
+> What were you expecting
+
+### Extra
+
+> any extra information you think is relevant to issue
+
+### Environment
+
+- **Operation System:**
+- **Go Version:**

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Any new functionality for Berjis.
+title: ''
+labels: ''
+---
+
+<!--
+Thank you in advance for helping us to improve Berjis!
+
+Please read through the template below and answer all relevant questions.
+Your additional work here is greatly appreciated and will help us respond as quickly as possible.
+-->
+
+## Describe the problem you'd like to have solved
+
+> A clear and concise description of what the problem is.
+
+### Describe the ideal solution
+
+> A clear and concise description of what you want to happen.
+
+### Alternatives and current work-around
+
+> A clear and concise description of any alternatives you've considered or any work-around that are currently in place.
+
+### Additional context
+
+> Add any other context or screenshots about the feature request here.

.github/PULL_REQUEST_TEMPLATE.md

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+
+## Description
+
+Briefly describe the changes introduced by this pull request.
+
+## Related issue(s)
+
+If this Pull Request is related to an issue, mention it here.

.github/workflows/linting.yml

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+name: Lint and format check
+
+on:
+  push:
+    branches:
+      - main
+
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  linting:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Install Go
+      uses: actions/setup-go@v3
+      with:
+        go-version: 1.20.5
+
+    - name: Checkout code
+      uses: actions/checkout@v3
+
+    - name: Installing golangci-lint
+      run: go install github.com/golangci/golangci-lint/cmd/golangci-lint@latest
+
+    - name: Formatting and linting the project
+      run: make check

.github/workflows/testing.yml

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+name: Unit testing
+
+on:
+  push:
+    branches:
+      - main
+
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  test:
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+    runs-on: ${{ matrix.os }}
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v3
+
+    - name: Install Go
+      uses: actions/setup-go@v3
+      with:
+        go-version: 1.19
+
+    - name: Unit tests
+      run: go test -v ./...

Makefile

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+check:
+	golangci-lint run \
+		--timeout=20m0s \
+		--enable=gofmt \
+		--enable=unconvert \
+		--enable=unparam \
+		--enable=asciicheck \
+		--enable=misspell \
+		--enable=revive \
+		--enable=decorder \
+		--enable=reassign \
+		--enable=usestdlibvars \
+		--enable=nilerr \
+		--enable=gosec \
+		--enable=exportloopref \
+		--enable=whitespace \
+		--enable=goimports \
+		--enable=gocyclo \
+		--enable=lll