As a user
I want to have an option to have remote notifications instead of just local
So I don't have to run a foreground service

Description

We should give users an option to enable remote notifications for android as well as IOS, as some users are put off by the foreground service.

The backend should be mostly implemented, but we need to set up firebase, pass a token etc.

The library we currently use for IOS is currently not maintained, so maybe it's worth looking into moving to a different library:

https://github.com/invertase/notifee

or

https://github.com/wix/react-native-notifications

For example.

Another thing that is important is that the resulting build still has any google dependencies removed, in order to make sure it's releasable on fdroid.
cc @jakubgs that can make sure that's the case.