Add Pull Request Labeler

Closes #1658

.github/labeler.yml

@@ -0,0 +1,19 @@
+'Area: API':
+  - src/Prowlarr.Api.V1/**/*
+
+'Area: Db-migration':
+  - src/NzbDrone.Core/Datastore/Migration/*
+
+'Area: Download Clients':
+  - src/NzbDrone.Core/Download/Clients/**/*
+
+'Area: Indexer':
+  - src/NzbDrone.Core/Indexers/**/*
+
+'Area: Notifications':
+  - src/NzbDrone.Core/Notifications/**/*
+
+'Area: UI':
+  - frontend/**/*
+  - package.json
+  - yarn.lock

.github/workflows/labeler.yml

@@ -0,0 +1,12 @@
+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