fix scrolling on windows

[DissolveDZ]

scrolling on windows would return a value 120 times bigger than it should be rather than 1
this pull request just uses .signum() to clamp the range that mouse_wheel().1 would return

[not-fl3]

It looks like this 120 comes from some sort of a setting and on other platforms miniquad also is sending unprocessed/unnormalized values from the OS too?

Maybe we should split it, make platform-independent, 0/1 value and also provide platform dependent value?

Also, I am not quite sure how to make it without being a big breaking change for everyone who used to rely on the OS values.

[DissolveDZ]

I'm not quite sure what the OS values would represent as i never changed much and i was kind of thrown off by it after porting my game to windows

[DissolveDZ]

if found the following in the official documentation
The wheel rotation will be a multiple of WHEEL_DELTA, which is set at 120. This is the threshold for action to be taken, and one such action (for example, scrolling one increment) should occur for each delta.

[DissolveDZ]

so i'm guessing the mouse itself controls this mouse delta value but this would result in inconsistent scrolling across different mouses so you could make this some kind of function like mouse_scroll_delta or smth. like that due to most people not knowing that this is a threshold and not the actual scroll and that it could differ from mouse to mouse