Implement event-driven packet system

[ConnorLinfoot]

Implements support for event-driven packets.

• Event packets are triggered from the server based on specific events, at this time the only event supported is the location event.
• Events are in the namespace hyevent
• Events are managed by the HypixelModAPI implementation and sent to the server via a custom register packet to allow version context for backward compatibility with older client versions.
• Joining the Hypixel Server will result in receiving a hypixel:hello packet, this can be used to identify that the client has connected to Hypixel, as well as containing the environment of the connected server.
• This PR also removes the existing location packet, in favor of the event version of the packet.

Note: At this time none of these changes are implemented on the production server.