CFE-4659: Added GH-action to automatically generate and send pull-request for changelog

.github/workflows/update-changlog.yml

@@ -0,0 +1,57 @@
+name: Update changelog
+permissions:
+  contents: write
+  pull-requests: write
+on:
+  workflow_dispatch:
+    inputs:
+      branch:
+        description: 'Version to release (3.24.x, 3.27.x, master)'
+        required: true
+        default: 'master'
+        type: string
+jobs:
+  generate-changelog:
+    runs-on: ubuntu-24.04
+
+    steps:
+    - name: Checkout core
+      uses: actions/checkout@v3
+      with:
+        fetch-tags: true
+        fetch-depth: 0
+        path: repos/core
+        repository: cfengine/core
+        ref: ${{ inputs.branch }}
+
+    - name: Set up Python
+      uses: actions/setup-python@v5
+      with:
+        python-version: '3.12'
+    - name: Install cfengine-cli
+      run: |
+        pip install git+https://github.com/cfengine/cfengine-cli
+
+    - name: Generate changelog
+      run: |
+        cd repos/core
+        cfengine dev generate-changelog
+
+    - name: Run Prettier
+      uses: creyD/prettier_action@v4.6
+      with:
+        prettier_options: --write repos/core/CHANGELOG.md
+        only_changed: false
+
+    - name: Create Pull Request
+      uses: cfengine/create-pull-request@v6
+      with:
+        path: repos/core
+        branch: changelog/auto-update-changelog-${{ inputs.branch }}
+        base: ${{ inputs.branch }}
+        delete-branch: true
+        title: "docs: update changelog for ${{ inputs.branch }}"
+        body: |
+          Auto-generated changelog update.
+          - **Source branch:** ${{ inputs.branch }}
+          - **Generated by:** cfengine dev generate-changelog