Get user from Update

[wahidustoz]

UpdateHandler class juda kop ish bajargani uchun uni tasklarini bo'lish kerak.

UPdate ichida userni ajratib olihs qismini extensino methodga chiqarish keark.

• [ ] /Extensions/TelegramExtensions.cs static class yarating
• [ ] public static Telegram.Types.User GetSender(this Update update) methodi telegram update dan user ni ajratib qaytaradi

  => update.Type switch
      {
          UpdateType.Message => update.Message.From,
          UpdateType.EditedMessage => update.EditedMessage.From,
          UpdateType.CallbackQuery => update.CallbackQuery.From,
          UpdateType.InlineQuery => update.InlineQuery.From,
          _ => throw new Exception("We dont supportas update type {update.Type} yet")
      };