Add support for Revolt

Is your feature request related to a problem? Please describe. I would like to be able to use Matterbridge with Revolt Chat on self hosted instances as well as the official Revolt service to bridge channels with Discord and IRC

https://github.com/revoltchat

Describe the solution you'd like Basic bridge functionality

Describe alternatives you've considered There is no alternative

Additional context This could help migrate communities to another alternative self hosted platform