ci: add the mention workflow

.github/workflows/claude.yml

@@ -0,0 +1,31 @@
+name: Claude Code
+on:
+  issue_comment:
+    types: [created]
+  pull_request_review_comment:
+    types: [created]
+jobs:
+  claude:
+    if: contains(github.event.comment.body, '@claude')
+    runs-on: ubuntu-latest
+    timeout-minutes: 15
+    permissions:
+      contents: write
+      pull-requests: write
+      issues: write
+      id-token: write
+      actions: read
+    steps:
+      - uses: actions/checkout@v6
+        with:
+          fetch-depth: 1
+      - uses: actions/create-github-app-token@v1
+        id: app-token
+        with:
+          app-id: ${{ secrets.VANDAME_APP_ID }}
+          private-key: ${{ secrets.VANDAME_APP_PRIVATE_KEY }}
+      - uses: anthropics/claude-code-action@v1
+        with:
+          claude_code_oauth_token: ${{ secrets.CLAUDE_CODE_OAUTH_TOKEN }}
+          github_token: ${{ steps.app-token.outputs.token }}
+          claude_args: "--max-turns 10"