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)

damus/Nostr/NostrEvent.swift

@@ -804,3 +804,15 @@ func to_reaction_emoji(ev: NostrEvent) -> String? {
     }
 }
 
+extension NostrEvent {
+    /// The mutelist for a given event
+    ///
+    /// If the event is not a mutelist it will return `nil`.
+    var mute_list: Set<MuteItem>? {
+        if (self.kind == NostrKind.list_deprecated.rawValue && self.referenced_params.contains(where: { p in p.param.matches_str("mute") })) || self.kind == NostrKind.mute_list.rawValue {
+            return Set(self.referenced_mute_items)
+        } else {
+            return nil
+        }
+    }
+}

damus/Nostr/NostrKind.swift

@@ -17,7 +17,8 @@ enum NostrKind: UInt32, Codable {
     case boost = 6
     case like = 7
     case chat = 42
-    case list = 30000
+    case mute_list = 10000
+    case list_deprecated = 30000
     case longform = 30023
     case zap = 9735
     case zap_request = 9734

damus/Nostr/ReferencedId.swift

@@ -119,7 +119,7 @@ enum RefId: TagConvertible, TagKeys, Equatable, Hashable {
     case event(NoteId)
     case pubkey(Pubkey)
     case quote(QuoteId)
-    case hashtag(TagElem)
+    case hashtag(Hashtag)
     case param(TagElem)
     case naddr(NAddr)
     
@@ -155,7 +155,7 @@ enum RefId: TagConvertible, TagKeys, Equatable, Hashable {
         case .event(let noteId): return noteId.hex()
         case .pubkey(let pubkey): return pubkey.hex()
         case .quote(let quote): return quote.hex()
-        case .hashtag(let string): return string.string()
+        case .hashtag(let string): return string.hashtag
         case .param(let string): return string.string()
         case .naddr(let naddr):
             return naddr.kind.description + ":" + naddr.author.hex() + ":" + naddr.identifier
@@ -176,7 +176,7 @@ enum RefId: TagConvertible, TagKeys, Equatable, Hashable {
         case .e: return t1.id().map({ .event(NoteId($0)) })
         case .p: return t1.id().map({ .pubkey(Pubkey($0)) })
         case .q: return t1.id().map({ .quote(QuoteId($0)) })
-        case .t: return .hashtag(t1)
+        case .t: return .hashtag(Hashtag(hashtag: t1.string()))
         case .d: return .param(t1)
         case .a: return .naddr(NAddr(identifier: "", author: Pubkey(Data()), relays: [], kind: 0))
         }