Add GitHub Action to automatically label PRs (#794)

Adds "needs code review" and "needs testing" to all new PRs

.github/labeler.yml

@@ -0,0 +1,9 @@
+# Add 'needs code review' label to any changes within the entire repository
+needs code review:
+- changed-files:
+  - any-glob-to-any-file: '**'
+
+# Add 'needs testing' label to any changes within the entire repository
+needs testing:
+- changed-files:
+  - any-glob-to-any-file: '**'

.github/workflows/auto-label-pr.yml

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