Lobby network start

Adds basic lobby network:

Scene Flow: init -> menu -> connection menu -> lobby list -> player list

• init scene checks if you are a server or client
• menu is our main menu that only clients will be sent to (servers will stay on the init scene)
• connection menu is where clients can put in the ip and port of the server they want to connect to
• lobby list displays all game lobbies on that server
• player list displays all players in the lobby the client has just joined or created