+changelog-ignore: sync branches

.github/workflows/sync-branches.yml

@@ -0,0 +1,63 @@
+name: 🔃 Sync branches
+
+on:
+  push:
+    branches:
+      - 'v*'
+  workflow_dispatch:
+
+jobs:
+  check-branch:
+    runs-on: ubuntu-latest
+    outputs:
+      is-valid-branch: ${{ steps.branch_check.outputs.is-valid-branch }}
+    steps:
+      - name: Check if branch name starts with 'v'
+        id: branch_check
+        run: |
+          BRANCH_NAME=${{ github.ref }}
+          if [[ $BRANCH_NAME =~ refs/heads/v.* ]]; then
+            VALID=true
+          else
+            VALID=false
+          fi
+
+          echo "is-valid-branch=$VALID" >> $GITHUB_OUTPUT
+  merge-branches:
+    needs: check-branch
+    permissions:
+      contents: write
+    if: needs.check-branch.outputs.is-valid-branch == 'true'
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - name: Merge into dev/v**
+        run: |
+          # Extract the version number from the branch name
+          VERSION=$(echo "${GITHUB_REF}" | sed -n 's#refs/heads/v\([0-9]\+\)#\1#p')
+          SOURCE_BRANCH="v${VERSION}"
+          TARGET_BRANCH="dev/v${VERSION}"
+          # Set git config
+          git config user.name "${{ github.actor }}"
+          git config user.email "${{ github.actor_id }}+${{ github.actor }}@users.noreply.github.com"
+
+
+          echo "Merging $SOURCE_BRANCH into $TARGET_BRANCH"
+
+          # Checkout the source branch
+          git checkout $SOURCE_BRANCH
+          git pull origin $SOURCE_BRANCH
+          echo "Pulled latest for $SOURCE_BRANCH"
+
+          # Merge into the target branch
+          git checkout $TARGET_BRANCH
+          git merge --no-ff $SOURCE_BRANCH -m "Merge v$VERSION into dev/v$VERSION"
+          echo "Merged $SOURCE_BRANCH into $TARGET_BRANCH"
+
+          # Push changes
+          git push origin $TARGET_BRANCH
+          echo "Pushed changes to $TARGET_BRANCH"
+