feat: show timestamps for reactions in DMs

[SoCuul]

General idea:

• Hook IGDirectReactingUserListViewController's objectForListAdapter method
• Each object inside is a IGDirectReactingUserListCellViewModel (a subclass of NSObject)
• Use key-value coding to access subtitle key (which will be a string if it's your reaction, otherwise will be nil)
• Use the _reactions ivar array to get the NSString user id _userBasedReaction_usedId ivar and the NSDate _userBasedReaction_serverTimestamp ivar.
• Extract the user id from the object in the list adapter, to find an associated user id in the reactions array to get the corresponding date
  • IGDirectReactingUserModel = [IGDirectReactingUserListCellViewModel valueForKey:@""]
  • IGDirectUserKey = [IGDirectReactingUserModel valueForKey:@"userKey"]
  • IGDirectInternalUserKey = [IGDirectReactingUserModel valueForKey:@"internalUserKey"]
  • Hook the IGDirectInternalUserKey class and get the instagramId NSString ivar
• For each IGDirectReactingUserListCellViewModel in the array, get the corresponding _reactions ivar _userBasedReaction_serverTimestamp for the instagram id (if possible), then prepend the relative date (NSRelativeDateTimeFormatter) to the subtitle's original text