Add gamepad rumble feature

[Fussmatte]

Changes:

This PR adds a rumble/vibration feature for players who use gamepads. It's implemented as a toggleable option (currently off by default) in the game pad options submenu.

Currently these events in the game will cause haptic feedback to occur (sorted here roughly from high to low intensity):

• Deaths
• Screen shakes
• Collecting trinkets
• Touching teleporters
• Touching checkpoints
• Touching gravity lines/tokens

What still needs to be done:

• [ ] Determine all events that should have haptic feedback
• [ ] Determine optimal intensity for each event
• [ ] Test feature across multiple game pads (I may need help for this!)

Legal Stuff:

By submitting this pull request, I confirm that...

• [x] My changes may be used in a future commercial release of VVVVVV
• [x] I will be credited in a CONTRIBUTORS file and the "GitHub Friends" section of the credits for all of said releases, but will NOT be compensated for these changes

[flibitijibibo]

Functionally this seems fine, though we could maybe make use of HD rumble to do more of a "tap" rather than a traditional rumble spin for some of the more subtle effects. This isn't easily exposed in SDL right now but we support enough devices now that it's probably worth considering for SDL3...

Other than that, will leave the rest to Terry for design feedback.

[flibitijibibo]

Filed https://github.com/libsdl-org/SDL/issues/7509