WebRTC: Browser to Browser

[p-shahi]

Support WebRTC Browser to Browser as a first class transport in js-libp2p and deprecate webrtc-star and webrtc-direct.

• support Circuit Relay v2: feat: implement circuit v2 #1533
• feat: Browser to Browser js-libp2p-webrtc#90

[disarticulate]

+1

Inspiration https://github.com/yjs/y-webrtc

Monkey patch for buffering yjs/y-webrtc#20