Use WebRTC to connect to peerbook

[daonb]

Peerbook now supports WebRTC connection so we should replace the
websocket code used to day with a WebRTC connection. This will
allow us to have a more stable connection and also to have a
better performance.

Aditional Context

This means adding a WebRTC client and integration tests to ensure
it can connect to peerbook and perform all functionalities.