Feature Suggestion: Limiting the number of participants per room

Sorry for multiple tickets!

If there is a way to limit the total participants per room - perhaps via a global setting, that would be awesome.

Thanks for an amazing demo app.

The issue requests a way to limit total participants per room, possibly through a global setting. No files, tests, entry points, or acceptance criteria are named, so begin by locating the room participant-handling code and existing configuration paths. Done would mean the limit can be configured and is enforced for each room.

Written by the indexing model from the issue text.