ci: add labeler action

Author: ChenZiHong-Gavin

.github/labeler.yml

@@ -0,0 +1,19 @@
+core:
+- graphgen/**/*
+
+examples:
+- examples/**/*
+
+baselines:
+- baselines/**/*
+
+documentation:
+- "**/*.md"
+
+workflows:
+- .github/workflows/*.yml
+
+config:
+- .github/labeler.yml
+- .pre-commit-config.yaml
+- .pylintrc

.github/workflows/labeler.yml

@@ -0,0 +1,17 @@
+name: Labeler
+on:
+  pull_request_target:
+    types: [opened, synchronize, reopened]
+
+permissions:
+  contents: read
+  pull-requests: write
+
+jobs:
+  label:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/labeler@v4
+        with:
+          repo-token: "${{ secrets.GITHUB_TOKEN }}"
+          configuration-path: .github/labeler.yml