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/__init__.py

@@ -6,7 +6,7 @@ from .analyze import AnalyzeTool
 from .chat import ChatTool
 from .debug_issue import DebugIssueTool
 from .review_code import ReviewCodeTool
-from .review_pending_changes import ReviewPendingChanges
+from .review_changes import ReviewChanges
 from .think_deeper import ThinkDeeperTool
 
 __all__ = [
@@ -15,5 +15,5 @@ __all__ = [
     "DebugIssueTool",
     "AnalyzeTool",
     "ChatTool",
-    "ReviewPendingChanges",
+    "ReviewChanges",
 ]