feat: improve PR review examples with context and tools (#504)

- Add PR repository and number to review prompts
- Note that PR branch is already checked out
- Update allowed tools to use inline comments and gh CLI
- Remove experimental review mode example in favor of standardized approach

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-authored-by: Claude <noreply@anthropic.com>

examples/claude-review-from-author.yml

@@ -27,8 +27,13 @@ jobs:
         with:
           anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
           prompt: |
+            REPO: ${{ github.repository }}
+            PR NUMBER: ${{ github.event.pull_request.number }}
+
             Please provide a thorough review of this pull request.
 
+            Note: The PR branch is already checked out in the current working directory.
+
             Since this is from a specific author that requires careful review,
             please pay extra attention to:
             - Adherence to project coding standards
@@ -38,3 +43,6 @@ jobs:
             - Documentation
 
             Provide detailed feedback and suggestions for improvement.
+
+          claude_args: |
+            --allowedTools "mcp__github_inline_comment__create_inline_comment,Bash(gh pr comment:*), Bash(gh pr diff:*), Bash(gh pr view:*)"