refactor: rename review_pending_changes to review_changes

- Renamed tool from review_pending_changes to review_changes for brevity
- Enhanced tool descriptions for better MCP auto-discovery
- Updated all references throughout codebase including:
  - Tool implementation (tools/review_changes.py)
  - Test files (tests/test_review_changes.py)
  - Server registration and imports
  - Documentation in README.md
  - Tool prompts in prompts/tool_prompts.py
- Enhanced review_changes description to emphasize pre-commit usage
- All tests pass, linting and formatting checks pass

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

Co-Authored-By: Claude <noreply@anthropic.com>

tools/base.py

@@ -86,7 +86,7 @@ class BaseTool(ABC):
                         f"Please provide the full absolute path starting with '/'"
                     )
 
-        # Check if request has 'path' attribute (for review_pending_changes)
+        # Check if request has 'path' attribute (for review_changes)
         if hasattr(request, "path") and request.path:
             if not os.path.isabs(request.path):
                 return (