Fix ton_bridge

[xlabtg]

I noticed the following, the bot cannot work with the plug-in tools, when installing the plug-in and enabling it in the installed tab after restarting the agent, all the plug-ins that are included there are duplicated and this happens after each reboot of the agent, this is some kind of bug, it also needs to be done so that the agent can freely see and be able to work with these tools, ton_bridge_open, ton_bridge_custom_message, ton_bridge_about check everything for compliance with the standard of plug-ins for teleton and fix if there are any bugs that affect the operation of this plug-in and agent.

The original telethon of the agent https://github.com/TONresistor/teleton-agent
Our fork is the agent's teleton https://github.com/xlabtg/teleton-agent
Original plugins https://github.com/TONresistor/teleton-plugins
Our fork of plugins https://github.com/xlabtg/teleton-plugins