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>

tools/analyze.py

@@ -37,8 +37,7 @@ class AnalyzeTool(BaseTool):
         return (
             "ANALYZE FILES & CODE - General-purpose analysis for understanding code. "
             "Supports both individual files and entire directories. "
-            "Use this for examining files, understanding architecture, or investigating specific aspects. "
-            "Triggers: 'analyze these files', 'examine this code', 'understand this'. "
+            "Use this when you need to analyze files, examine code, or understand specific aspects of a codebase. "
             "Perfect for: codebase exploration, dependency analysis, pattern detection. "
             "Always uses file paths for clean terminal output."
         )