Multiverse Compatibility: Updated the script to properly support Multiverse worlds.

World Validation: Added error handling for invalid world names in both `/disableaimobs` and `/enableaimobs` commands. If the world is not found or loaded, the script provides a clear error message.

Feedback Messages: Adjusted messaging to provide more informative and consistent responses when AI is disabled or enabled across worlds.

Cleaned up and optimized command logic for better performance and maintainability.