ci: PR auto labeler (#236)

Author: seqre

.github/labeler.yml

@@ -0,0 +1,19 @@
+C-lib:
+  - changed-files:
+      - any-glob-to-any-file: ['cot/**']
+
+C-cli:
+  - changed-files:
+      - any-glob-to-any-file: ['cot-cli/**']
+
+C-macros:
+  - changed-files:
+      - any-glob-to-any-file: ['cot-macros/**']
+
+C-codegen:
+  - changed-files:
+      - any-glob-to-any-file: ['cot-codegen/**']
+
+A-ci:
+  - changed-files:
+      - any-glob-to-any-file: ['.github/**']

.github/workflows/labeler.yml

@@ -0,0 +1,14 @@
+name: "Pull Request Labeler"
+
+on:
+  pull_request_target:
+  workflow_dispatch:
+
+jobs:
+  labeler:
+    permissions:
+      contents: read
+      pull-requests: write
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/labeler@v5