fix: Add missing logger import to config.py

The save() and add_project() methods were calling logger.info() without
importing the logging module. This caused NameError when /add-project
command tried to save configuration.

Added:
- import logging
- logger = logging.getLogger(__name__)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

claude_coordinator/config.py

@@ -9,7 +9,9 @@ from pathlib import Path
 from typing import Any, Dict, List, Optional
 import os
 import yaml
+import logging
 
+logger = logging.getLogger(__name__)
 
 # Known valid tool names from Claude API
 VALID_TOOLS = {