Add an AI review workflow

This adds AI review for pull requests, using the workflow and
pattern already used by several Quality projects. Pull requests
will be reviewed by
https://gitlab.com/redhat/edge/ci-cd/ai-code-review/ whenever the
'ai-review-please' label is applied to them. Also adds a context
file, generated by claude-4.6-opus-high via Cursor, using the
https://github.com/juanje/context-generator skill, as recommended
by ai-code-review upstream.

Signed-off-by: Adam Williamson <awilliam@redhat.com>
Assisted-by: claude-4.6-opus-high
Assisted-by: Cursor-2.6.11

.forgejo/workflows/ai-review.yaml

@@ -0,0 +1,15 @@
+---
+name: AI Code Review
+on:
+  pull_request_target:
+    types: [labeled]
+
+jobs:
+  ai-review:
+    runs-on: infra-1
+    if: forgejo.event.label.name == 'ai-review-please'
+    uses: quality/workflows/.forgejo/workflows/ai-review.yml@main
+    with:
+      pr: ${{ forgejo.event.pull_request.number }}
+    secrets:
+      GEMINI_API_KEY: ${{ secrets.GEMINI_API_KEY }}