Improve room setup interface in web service

Make it easy to configure new rooms or adjust room configurations in the web interface.

The idea is that camera resources are tagged with locations and rooms can be constructed based upon some location tag. All cameras with that location can be formed into a single stream, with all the required stream frames and config channels being generated automatically.

Implementation options: provide a new web service specifically for the browser (backend-for-frontend bff). This then deals with communicating to the existing services to generate streams and configurations, so that the browser sends simpler room creation requests and doesn't need to generate the streams and configs itself.