[feature request] Add support for haptic feedback

[Apteryks]

Hi,

I know the game has support for "force feedback", which is about creating resistance on a driving wheel controller. I think it'd also be nice to have support for "haptic" feedback, that is, a controller vibrating when there are collisions for example.

SDL2 apparently has an API for that. I play with a Nintendo Switch Pro gamepad, which has haptic feedback available; I guess other modern gamepads have that too.

Thanks for this great game!

[Apteryks]

I've made some research as to why force feedback didn't already work with my gamepad; it appears the haptic feedback in SDL is more geared toward joysticks and driving wheels than gamepad, and that there is a different vibrating API in SDL 2 for gamepads; see: https://sourceforge.net/p/speed-dreams/tickets/1293/.