fix: replace all print() with click.echo() or logger in CLI production code

- 55 CLI files: handlers/, aitbc_cli/commands/, cli/core/, cli/utils/, top-level scripts
- Click-based files: print() -> click.echo()
- Library modules: print() -> logger.info/error/warning
- Fixed pre-existing indentation bugs in monitor.py dashboard function
- Fixed bare print() -> logger.info('') in chain_manager.py
- 0 remaining print() in production CLI code
- All files compile cleanly

cli/templates/handler_template.py

@@ -1,3 +1,6 @@
+import logging
+logger = logging.getLogger(__name__)
+
 """{{COMMAND_NAME}} command handlers."""
 
 def handle_{{COMMAND_NAME}}_action(args, render_mapping):
@@ -11,5 +14,5 @@ def handle_{{COMMAND_NAME}}_action(args, render_mapping):
         "timestamp": __import__('datetime').datetime.now().isoformat()
     }
     
-    print(f"{{COMMAND_NAME}} executed with option: {option_value}")
+    logger.info(f"{{COMMAND_NAME}} executed with option: {option_value}")
     render_mapping("Result:", result)