Add channel/system messages support

[imcouri]

Hello,
I was wondering if there is a way to add channel messages that notify users about changes/updates in the room using this package.
Thank you

[demchenkoalex]

Hi @imcouri you are talking about SystemMessage we are plan to introduce. At this point of time you can try to use CustomMessage to do whatever you want.

[demchenkoalex]

more context: #573

[demchenkoalex]

more context: #620