[WIP] Switch to Netty ReadTimeoutHandler

The current method we use to timeout clients is based on the server tickrate. We should not use that, and instead use something built-in to Netty to stay reliable.

This is a work in progress, as we should also implement a new method of accomplishing the ping-pong process that is asynchronous. My reasoning behind this is that even if the server stops ticking to do a large amount of logic, your client should not disconnect due to a read timeout like you do in vanilla.
Ideas? (re: todo)