ViaVersion

fb5bc82 Add connection details protocol implementation (#4371)

Adds an optional custom payload protocol which platforms can use to communicate the native version of users across backend servers, the current implementation supports Velocity by sending the player's native version to the backend servers. Platforms may call ConnectionDetails#sendConnectionDetails themselves to ensure the packet getting handled by the server.

Co-authored-by: Nassim Jahnke nassim@njahnke.dev