Scheduled notification support

[alionour]

Feature required : to add capability to schedule some notificatiobs to be show at specific time,

[mohabouje]

I added this request to the feature-request list for version v1.4.0.

It will be using the Windows scheduler:

https://learn.microsoft.com/en-us/windows/apps/design/shell/tiles-and-notifications/scheduled-toast

See: https://github.com/mohabouje/WinToast/blob/master/request.md

[mohabouje]

Closing to keep track of each feature in #86