Merge improved mute functionality from Charlie

This merge adds a bunch of new features from charlie's work on the new
mutelist changes:

- Muted words

- Mute performance optimizations

- New mute list UI

I needed to make a few changes to fix the tests in this merge. Otherwise
it seems to work ok!

Thank to Charlie for getting all of this working after many rounds of
review!

* branch `mute` of https://github.com/damus-io/damus:
  mute: fix bug with duplicate Indefinite items in MuteDurationMenu
  mute: fix mute hashtag from search view if no existing mutelist
  mute: integrate new MutelistManager
  mute: adding MutelistManager.swift
  mute: add maybe_get_content function to NdbNote
  mute: fix bug where mutes can't be added without existing mutelist
  mute: fix issue with not being able to change mute duration
  mute: don't mutate string when adding hashtag
  mute: implement fast MuteItem decoder
  tags: add u64 decoding function
  mute: migrating muted_threads to new mute list
  mute: adding ability to mute hashtag from SearchView
  mute: updating UI to support new mute list
  mute: adding filtering support for MuteItem events
  mute: receiving New Mute List Type
  mute: migrate Lists.swift to use new MuteItem
  mute: add new UI views for new mute list
  mute: adding new structs/enums for new mute list

Changelog-Added: Add ability to mute words, add new mutelist interface (Charlie)

damusTests/Mocking/MockDamusState.swift

@@ -25,11 +25,12 @@ func generate_test_damus_state(
         return profiles
     }()
     
+    let mutelist_manager = MutelistManager()
     let damus = DamusState(pool: pool,
                            keypair: test_keypair,
                            likes: .init(our_pubkey: our_pubkey),
                            boosts: .init(our_pubkey: our_pubkey),
-                           contacts: .init(our_pubkey: our_pubkey),
+                           contacts: .init(our_pubkey: our_pubkey), mutelist_manager: mutelist_manager,
                            profiles: profiles,
                            dms: .init(our_pubkey: our_pubkey),
                            previews: .init(),
@@ -44,7 +45,6 @@ func generate_test_damus_state(
                            postbox: .init(pool: pool),
                            bootstrap_relays: .init(),
                            replies: .init(our_pubkey: our_pubkey),
-                           muted_threads: .init(keypair: test_keypair),
                            wallet: .init(settings: settings),
                            nav: .init(),
                            music: .init(onChange: {_ in }),