mute: integrate new MutelistManager

This patch is slightly large (I think still within the guidelines tho) ,
but also pretty straightforward. I thought for a while about how I could
split this up in a straightforward way, and I couldn’t come up with
anything without breaking intermediate builds.

- Deleted a lot of old/unnecessary code (ie. the Collection extension
  for MuteItem, since we’re now using the MutelistManager sets)

- Changed damus_state.contacts to damus_state.mutelist_manager for all
  mute list manager work

- Updated MutelistView to take advantage of new code (this is probably
  the largest change in this patch)

Lighting-Address: fishcharlie@strike.me
Signed-off-by: Charlie Fish <contact@charlie.fish>
Reviewed-by: William Casarin <jb55@jb55.com>
Link: 20240210163650.42884-4-contact@charlie.fish
Signed-off-by: William Casarin <jb55@jb55.com>

DamusNotificationService/NotificationExtensionState.swift

@@ -11,6 +11,7 @@ struct NotificationExtensionState: HeadlessDamusState {
     let ndb: Ndb
     let settings: UserSettingsStore
     let contacts: Contacts
+    let mutelist_manager: MutelistManager
     let keypair: Keypair
     let profiles: Profiles
     let zaps: Zaps
@@ -27,6 +28,7 @@ struct NotificationExtensionState: HeadlessDamusState {
         self.settings = UserSettingsStore()
         
         self.contacts = Contacts(our_pubkey: keypair.pubkey)
+        self.mutelist_manager = MutelistManager()
         self.keypair = keypair
         self.profiles = Profiles(ndb: ndb)
         self.zaps = Zaps(our_pubkey: keypair.pubkey)