Make the launcher not run after game is launched

[candid citrus]

A very simple optimization fix. After launching the game I always have to go into Task Manager and end the Lunar Client launcher task. Once the game has launched, have the launcher stop. The launcher instances running in the background (not as a window) take up large amounts of CPU and memory. This would be a great optimization and quality of life fix. As one of the main selling points of Lunar Client is improved FPS, it should not make my FPS worse if I do not close a ton of tasks it creates.

[warm cradle]

I get like 30 fps with no mods in lunar client

and much more with the launcher process ending