Add waitTick built-in to pressKey and pressMouse

[Earthcomputer]

This addresses the footgun that the effects of key bindings aren't felt until a tick is waited.

This is a symptom of a wider issue with having the game suspended while gametest code is running, that sometimes the game needs to tick to see the effects of your code, depending on how that specific component of the game was coded. I don't think there is a way to completely solve this issue without reverting to running concurrently with the game which introduces thread safety issues which I believe are more dangerous.

I've added some documentation specifically warning users about the issue of delayed effects, and encouraging them to take debug screenshots to figure out what's going on, and that a simple waitTick could be the solution to their issue.