Sort out the increasing mess coming from:
- AppContext*
- Dependencies
- Shared*
by doing the following:
- Keep in the "Shared" folder only the entities actually shared by
App/Tunnel
- Create TunnelContext
- Move AppContext and related to the App/Context folder
- Move TunnelContext and related to the Tunnel/Context folder
- Delete Shared+* extensions, use AppContext/TunnelContext singletons
from the app
- Create a Dependencies factory singleton to create entities in a single
place
- Split extensions by domain
- Make it clear with `func` vs `var` when a dependency method returns a
new instance
Simplify preferences model by doing a bulk load/save together with
load/save Profile. ModulePreferences is now a struct rather than an
ObservableObject, because it doesn't need ad hoc observation. It's just
a binding to ProfileEditor.preferences
Fix:
- Disable CloudKit in tunnel singleton of PreferencesManager
(.sharedForTunnel)
Additionally:
- Replace MainActor in PreferencesManager with Sendable (immutable)
- Replace MainActor from ProviderPreferencesRepository with Sendable
(syncs on NSManagedObjectContext)
- Drop ModuleMetadata for good