Add a class for a WebSocketEvent

[lucianoratamero]

This one will probably be a lot different from the current events, at least if we keep in mind that the code should call the redux flow (itself) whenever a new message happens in the web socket side.

Just for reference: https://medium.com/@rossbulat/react-managing-websockets-with-redux-and-context-61f9a06c125b

[lucianoratamero]

https://github.com/channels-frontend/django-channels