[feature] Add notifications

[ghost]

It would be beneficial if the app could notify you about an upcoming period a configurable number of days in advance. The notification could have and action like "already started" which would cause the day to be recorded in the calendar.

[fairking]

Lack of notifications forced me to use a different app. It's the worse when you miss and all your plans are gone.

[retiolus]

Is the addition of notifications still a thing?

[fairking]

Is the addition of notifications still a thing?

You ask like you never use the app in real life 😂

[arnowelzel]

Pull requests to provide this feature are welcome.