mute: migrating muted_threads to new mute list

This patch depends on: Adding ability to mute hashtag from SearchView

This is the last patch for the new mute list feature

- Removing MutedThreadsManager
- Adding system to migrate existing muted threads to new mute list

Closes: https://github.com/damus-io/damus/issues/1718
Closes: https://github.com/damus-io/damus/issues/856
Lighting Address: fishcharlie@strike.me
Signed-off-by: Charlie Fish <contact@charlie.fish>
Reviewed-by: William Casarin <jb55@jb55.com>
Signed-off-by: William Casarin <jb55@jb55.com>

damus/Models/ContentFilters.swift

@@ -33,7 +33,7 @@ func get_repost_of_muted_user_filter(damus_state: DamusState) -> ((_ ev: NostrEv
         guard ev.known_kind == .boost else { return true }
         // This needs to use cached because it can be way too slow otherwise
         guard let inner_ev = ev.get_cached_inner_event(cache: damus_state.events) else { return true }
-        return should_show_event(keypair: damus_state.keypair, hellthreads: damus_state.muted_threads, contacts: damus_state.contacts, ev: inner_ev)
+        return should_show_event(contacts: damus_state.contacts, ev: inner_ev)
     }
 }