Fix Linking

Add callback_data_template to config.yml and implement POST request usage

Update Bridge and add Linking

Updated bridge behaviour:

• new configuration;
• can be disabled;
• allow notification without bridge for chat.

Add Linking:

• linking Minecraft account to Telegram user account API (send message with inline button to Telegram user conversation).

First release

Functions:

• /telegram command - send message to Telegram Chat;
• /telegram-chat-response command - interface to send message with Telegram Bot;
• startup/shutdown server notifications;
• templates for outcoming/outcoming broadcast/incoming messages and startup/shutdown notifications.