.github/workflows/sync_branches.yml: Add workflow

Author: mkopec

.github/workflows/sync_branches.yml

@@ -0,0 +1,41 @@
+name: Sync Commits to Stable Branch
+
+on:
+  push:
+    branches:
+      - hdmi_frl
+
+permissions:
+  contents: write
+
+jobs:
+  sync:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout Code
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Configure Git
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+
+      - name: Sync Commits
+        run: |
+          COMMITS=$(git log origin/master..origin/${{ github.ref_name }} --pretty=format:"%H" | tac)
+
+          if [ -z "$COMMITS" ]; then
+            echo "No new commits to sync."
+            exit 0
+          fi
+
+          git checkout hdmi_frl_stable
+
+          for commit in $COMMITS; do
+            echo "Cherry-picking $commit"
+            git cherry-pick $commit || (git cherry-pick --abort && echo "Conflict skipped" && exit 1)
+          done
+
+          git push origin hdmi_frl_stable