Persist profiles to Core Data

[keeshux]

• [x] Rename container to something else than "Profiles" to not overwrite existing storage
• [x] Persist active profile to local preferences e.g. @AppStorage
• [x] Infer activeProfileId from installed NE profile

[keeshux]

NSFetchedResultsController triggers controllerDidChangeContent() also for local changes:

https://stackoverflow.com/questions/60480953/how-to-be-notified-when-received-changes-from-only-the-remote-cloudkit-database?rq=3