ci: backport & labeler config

.github/workflows/labeler.yml

@@ -0,0 +1,21 @@
+name: "Label PR"
+
+on:
+  pull_request_target:
+    types: [edited, opened, synchronize, reopened]
+
+permissions:
+  contents: read
+  pull-requests: write
+
+jobs:
+  labels:
+    name: "Label PR"
+    runs-on: ubuntu-latest
+    if: "!contains(github.event.pull_request.title, '[skip ci]')"
+    steps:
+      - uses: actions/labeler@v5
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          configuration-path: .github/labeler.yml
+          sync-labels: true