* docs: various docs updates to include what is new
in BBB 3.0.0-beta.1
- api changes
- dropped functionality
* docs: info on infinite whiteboard and seen chat
Adding screenshots and descriptions about the infinite whiteboard and
seen private chat messages to the 3.0 what-is-new docs
* docs: Add description of 3.0 new audio features
- improved ux for transparent listen only
- push to talk
