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_thinking_modes.py

@@ -7,8 +7,8 @@ from unittest.mock import Mock, patch
 import pytest
 
 from tools.analyze import AnalyzeTool
+from tools.codereview import CodeReviewTool
 from tools.debug import DebugIssueTool
-from tools.review_code import ReviewCodeTool
 from tools.think_deeper import ThinkDeeperTool
 
 
@@ -27,7 +27,7 @@ class TestThinkingModes:
         tools = [
             (ThinkDeeperTool(), "high"),
             (AnalyzeTool(), "medium"),
-            (ReviewCodeTool(), "medium"),
+            (CodeReviewTool(), "medium"),
             (DebugIssueTool(), "medium"),
         ]
 
@@ -77,7 +77,7 @@ class TestThinkingModes:
         )
         mock_create_model.return_value = mock_model
 
-        tool = ReviewCodeTool()
+        tool = CodeReviewTool()
         result = await tool.execute(
             {
                 "files": ["/absolute/path/test.py"],