Moves the event handling logic for the M365 Apps/Office options from the main UI script into the `FFUUI.Core.Handlers` module.
This change centralizes UI event handling, improving code organization and maintainability. It also decouples the handlers from the main script by using a local state object instead of a global script variable.
Moves all UI event handling logic from the initialization script into a new, dedicated module `FFUUI.Core.Handlers.psm1`.
This change improves code organization and separation of concerns by centralizing event handler registration.