feat: 自動PRレビューGitHub Actionsワークフロー追加

 (#349)

Author: komura-c

.github/workflows/claude.yml

@@ -34,3 +34,6 @@ jobs:
         with:
           anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
           timeout_minutes: '60'
+          direct_prompt: |
+            Emphasize the following:
+            - Please use Japanese for everything.