ci(actions): Add sync_branches workflow

.github/workflows/sync_branches.yml

@@ -0,0 +1,28 @@
+name: Sync Branches
+on:
+  push:
+    - "2.4"
+    - "2.5"
+
+jobs:
+  sync-branches:
+    strategy:
+      matrix:
+        include:
+          - from_branch: 2.4
+            to_branch: 2.5
+          - from_branch: 2.5
+            to_branch: main
+    runs-on: ubuntu-latest
+    if: ${{ github.ref_name == matrix.to_branch }}
+    steps:
+      - name: Merge ${{ matrix.from_branch }} into ${{ matrix.to_branch }}
+        uses: tretuna/[email protected]
+        with:
+          GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}
+          FROM_BRANCH: ${{ matrix.from_branch }}
+          TO_BRANCH: ${{ matrix.from_branch }}
+          CONTENT_COMPARISON: true  # Prevent empty PRs
+          PULL_REQUEST_TITLE: Merge changes from `${{ matrix.from_branch }}` into `${{ matrix.to_branch }}`
+          PULL_REQUEST_BODY: |
+            New content has landed in the `${{ matrix.from_branch }}` branch, so let's merge the changes into `${{ matrix.to_branch }}`.