Update narrative and event system

Added

Support for YAML and JSON configuration files for game setup.
New fields in the Event struct:
- add_subject: Adds a new subject to the room when the event is triggered.
- remove_subject: Removes a subject from the room when the event is triggered.
- move_subject_to_location: Moves a subject to a different room when the event is triggered.
Error handling for missing or invalid event data.
Proper error messages for parsing errors and missing data.
Serialization and deserialization support for game progress saving and loading.

Changed

Refactored handle_event function to improve readability and maintainability.
Updated process_subject_movement function to handle subject movement and removal separately.
Modified return_formated_message function to simplify the logic and improve performance.
Enhanced error handling in the parse_input and json_parse_input functions.
Improved documentation and code comments for better understanding and usability.
Updated wasm examples

Fixed

Fixed issue with multiple mutable borrows in the on_submit function.
Fixed incorrect behavior when processing subject movement and removal in events.

Removed

Navigation Menu