refactor: rename review tools for clarity and consistency

- Renamed `review_code` tool to `codereview` for better naming convention
- Renamed `review_changes` tool to `precommit` to better reflect its purpose
- Updated all tool descriptions to remove "Triggers:" sections and improve clarity
- Updated all imports and references throughout the codebase
- Renamed test files to match new tool names
- Updated server.py tool registrations
- All existing functionality preserved with improved naming

This refactoring improves code organization and makes tool purposes clearer.

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

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

tests/test_server.py

@@ -20,11 +20,11 @@ class TestServerTools:
 
         # Check all core tools are present
         assert "think_deeper" in tool_names
-        assert "review_code" in tool_names
+        assert "codereview" in tool_names
         assert "debug" in tool_names
         assert "analyze" in tool_names
         assert "chat" in tool_names
-        assert "review_changes" in tool_names
+        assert "precommit" in tool_names
         assert "get_version" in tool_names
 
         # Should have exactly 7 tools