unified listener creation logic under `createEventListener`, adding support for a flexible `RegisterListenerConfig`. Updated associated tests and improved error handling for unregistered events.
Added support for validating and managing return values in events. Implemented `validate` and `clone` methods in the event base class for event mutation and return handling. Additionally, enhanced error handling, introduced "once" listeners, and improved async execution management in the `EventManager`.
Replaced `console.log` with `expect` in crypto tests for proper validation. Wrapped a test case with `withDisabledConsole` to suppress expected log output. Fixed typo in data test field configuration (`max_length` to `maxLength`).
