👷 add labeler action

.github/labeler.yml

@@ -0,0 +1,8 @@
+documentation:
+  - 'README.md'
+  - 'docs/*'
+  - 'docs/**/*'
+
+ci:
+  - '.github/workflows/*'
+  - '.github/external_ci/*'

.github/workflows/labeler.yml

@@ -0,0 +1,14 @@
+name: "Pull Request Labeler"
+on:
+  - pull_request_target
+
+jobs:
+  triage:
+    permissions:
+      contents: read
+      pull-requests: write
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/labeler@v4
+        with:
+          repo-token: "${{ secrets.GITHUB_TOKEN }}"