Telegram interface for basic configurations

[Virviil]

In order to allow admins to configure Buckler Bot, basic Telegram-based interface should be provided.

Possible worklow:

1. Calling /admin@BucklerBot - inline inside the needed Gorup or Channel will force Buckler to update list of admins for the channel using this method.
   The data should be saved inside new Admins table.
2. In direct messages with bot, every user can try to call /config command. The configurations process is started then.

Configuration process:

1. Bot returns list of any defended groups, where the user is admin (or nothing)
2. User choose the group, and asked to enter the language (mb as a keyboard wuth all languages - now en, ru)
3. User is asked to choose number of captcha attempts (Default is 3)

Config is saved inside existing chats table.