Add ability to launch a game from the command line

Add an option to run a game from the command line with a given set of arguments. Should also allow the server to join to be identified (allowing built in arguments construction logic to be used)

This should log into the backend (if you have previously logged in and have a refresh token), check for and install any required game updates and then run the game

If a launcher instance is already running pass the command line arguments to that to avoid the startup costs of a new instance

Ideally needs #95 to be addressed to smooth the process