Support websockets

[richardartoul]

Not sure exactly what this should look like, but for Actor it would be nice to be able to establish websocket connections to them to make it easier to implement realtime applications like chat and games.

[richardartoul]

Never heard of NATS until now. Looks interesting. Are you using it for messaging only or are you also using jet stream?

[aratz-lasa]

@gedw99 I've heard about NATS many times but have yet to use it. However, wouldn't it require running NATS servers? Since it's a client-server architecture. So this makes the architecture more complex.