chore(ci): add labeler action (#42)

* Add labeler config

* Add labeler workflow

* Update labeler config

.github/labeler.yml

@@ -0,0 +1,31 @@
+'area: background':
+  - any:
+      - changed-files:
+          - any-glob-to-any-file: 'src/background/**/*'
+
+'area: ci':
+  - any:
+      - changed-files:
+          - any-glob-to-any-file: '.github/**/*.yml'
+
+'area: content':
+  - any:
+      - changed-files:
+          - any-glob-to-any-file: 'src/content/**/*'
+
+'area: popup':
+  - any:
+      - changed-files:
+          - any-glob-to-any-file: 'src/popup/**/*'
+
+'area: documentation':
+  - any:
+      - changed-files:
+          - all-globs-to-any-file:
+              - '**/*.md'
+              - '!.github/actions/**/*.md'
+
+'area: tests':
+  - any:
+      - changed-files:
+          - any-glob-to-any-file: '**/*.test.ts'

.github/workflows/labels.yml

@@ -0,0 +1,21 @@
+name: PR Labeler
+
+on:
+  pull_request_target:
+    types:
+      - opened
+      - reopened
+      - synchronize
+
+jobs:
+  label:
+    permissions:
+      contents: read
+      pull-requests: write
+    runs-on: ubuntu-22.04
+    steps:
+      - name: Add labels
+        uses: actions/labeler@v5
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          sync-labels: true