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>

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(contacts: damus_state.contacts, ev: inner_ev)
+        return should_show_event(state: damus_state, ev: inner_ev)
     }
 }