Add labeler workflow.

.github/labaler.yml

@@ -0,0 +1,26 @@
+documentation:
+  - docs/*
+
+extras:
+  - extras/*
+  - extras/**/*
+
+sources:
+  - src/*
+  - src/**/*
+
+tests:
+  - tests/**/*
+  - tests/*
+
+web:
+  - web/*
+  - web/**/*
+
+appimage:
+  - appimage/*
+  - appimage/**/*
+
+3rdparty:
+  - 3rdparty/*
+  - 3rdparty/**/*

.github/workflows/labaler.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 }}"