ci(labeler): add automatic pull request labeling

Some new issue labels were added. This change attempts to partially
automate the manual effort of labeling, which is otherwise helpful
for being able to shift through past PRs concerning specific focus
points.

Author: n0toose

.github/labeler.yml

@@ -0,0 +1,15 @@
+'ci':
+  - changed-files:
+    - any-glob-to-any-file: ['.github/workflows/**']
+'tests':
+  - changed-files:
+    - any-glob-to-any-file: ['tests/**']
+'docs':
+  - changed-files:
+    - any-glob-to-all-files: ['*.md']
+'feature/security':
+  - changed-files:
+    - any-glob-to-any-file: ['src/isolation/**']
+'feature/uhyve-interface':
+  - changed-files:
+    - any-glob-to-any-file: ['uhyve-interface/**']

.github/workflows/labeler.yaml

@@ -0,0 +1,15 @@
+name: "Assign PR labels"
+on:
+  workflow_dispatch:
+  pull_request_target:
+
+jobs:
+  labeler:
+    permissions:
+      contents: read
+      pull-requests: write
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/labeler@v6
+      with:
+        sync-labels: true