#48 open-ai-pr-reviewrを追加 (#49)

https://github.com/coderabbitai/openai-pr-reviewer

will closes #48
<!-- This is an auto-generated comment: release notes by openai -->
### Summary by OpenAI

New Feature: Added `openai-pr-reviewer` GitHub Action for code review.

> "A bot of wisdom, with code it's smitten,
> OpenAI PR Reviewer, a reviewer that's written.
> With logic and insight, it lends its aid,
> Improving code quality, like a helpful blade."
<!-- end of auto-generated comment: release notes by openai -->

.github/workflows/openai-pr-reviewer.yml

@@ -0,0 +1,30 @@
+name: Code Review
+
+permissions:
+  contents: read
+  pull-requests: write
+
+on:
+  pull_request:
+  pull_request_review_comment:
+    types: [created]
+
+concurrency:
+  group:
+    ${{ github.repository }}-${{ github.event.number || github.head_ref ||
+    github.sha }}-${{ github.workflow }}-${{ github.event_name ==
+    'pull_request_review_comment' && 'pr_comment' || 'pr' }}
+  cancel-in-progress: ${{ github.event_name != 'pull_request_review_comment' }}
+
+jobs:
+  review:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: coderabbitai/openai-pr-reviewer@latest
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
+        with:
+          debug: false
+          review_simple_changes: false
+          review_comment_lgtm: false