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>

server.py

@@ -26,8 +26,8 @@ from tools import (
     AnalyzeTool,
     ChatTool,
     DebugIssueTool,
+    ReviewChanges,
     ReviewCodeTool,
-    ReviewPendingChanges,
     ThinkDeeperTool,
 )
 
@@ -45,7 +45,7 @@ TOOLS = {
     "debug_issue": DebugIssueTool(),
     "analyze": AnalyzeTool(),
     "chat": ChatTool(),
-    "review_pending_changes": ReviewPendingChanges(),
+    "review_changes": ReviewChanges(),
 }