Support for desktop widgets in Mac OS Sonoma

[iltrico]

While the Timer app is extremely useful, it would be even more accessible to users if we could implement support for Mac OS Sonoma widgets.

This feature would allow users to view the timer directly from their desktop, making it readily visible across desktops, notification center and stage manager. This would provide an at-a-glance view of the timer's status, saving users the need to navigate to the app itself.