Switch to websockets

[Protonull]

This PR intends to replace the TCP connection with a websocket connection, which has various benefits like deferring framing to the websocket protocol, deferring encryption to TLS, etc.

• Implements consider switching to websockets #43
• Rejects consider using protobuf #18
• Obviates disconnect detection using keepalives #7

[Protonull]

In terms of progress, I have been focusing on the client, but I have been battling perfectionism and scope creep. As you can see, the changes also include a refactor to the authentication process. But I have stashes that include changes to the config and the connection gui to better enforce contracts (eg: that sync addresses MUST be prefixed with ws:// or wss://). I'm also snagging on how to do state checking, reconnection, etc, thread-safely. Any help here would be appreciated.