Implement support for reply notification formatting

This commit implements support for nicely formatting reply push
notifications.

Testing
-------

PASS

Device: iPhone 15 simulator
notepush: 11568aa6285142e4c19bb0da30977957a92b7d9b
Damus: This commit
Settings: Local push notification setup
Steps:
1. Create a post from account 1
2. On account 2, make a reply to that post
3. Ensure we get a push notification with:
  - A title formatted as "<ACCOUNT_2_NAME> replied to your note"
  - A body with the contents of that reply
4. Click on that push notification. Ensure you are taken to the reply
5. Now make a post from account 2 and mention account 1 in it
6. Ensure push notification says that account 2 mentioned account 1 (i.e. does not talk about a reply)

Signed-off-by: Daniel D’Aquino <daniel@daquino.me>
Closes: https://github.com/damus-io/damus/issues/2403

DamusNotificationService/NotificationFormatter.swift

@@ -70,6 +70,9 @@ struct NotificationFormatter {
             case .zap, .profile_zap:
                 // not handled here. Try `format_message(displayName: String, notify: LocalNotification, state: HeadlessDamusState) async -> (content: UNMutableNotificationContent, identifier: String)?`
                 return nil
+            case .reply:
+                title = String(format: NSLocalizedString("%@ replied to your note", comment: "Heading for local notification indicating a new reply"), displayName)
+                identifier = "myReplyNotification"
         }
         content.title = title
         content.body = notify.content