Allow for split screen on PC and console

[TheGrimDeathZombie (Reapimus)]

@louisd5

having a copy of all the services including workspace for each client, having two local clients communicate to each other through the server instead of just communicating on the same device, etc.

In an ideal scenario, split screen support shouldn’t need to require duplicating every service for each individual screen as that would kind of defeat the point (why ask for a dedicated feature if it would have the same downsides of just using a ViewportFrame where we would waste memory on clones of the workspace?)