Full screen notifications

[macgyverkam]

I recently found an app that allows for displaying full-screen notifications. Maybe such a feature would also be useful in Calendr.

https://apps.apple.com/us/app/dato/id1470584107?mt=12

[pakerwreah]

I understand that this may be useful for some people, but it's beyond the scope of Calendr.

People have asked me for flashing lights and sound, but I always say no, because it's not meant to replace any notification system, just be available in the menu bar for a quick look.

Even if I implement this, I won't be using it or testing it, which creates another problem.

[pakerwreah]

Closing this in favor of #283