v0.9.0: Santroller haptics overhaul, 4-lane drumkit velocity updates

Changed

• XInput device layouts are now registered regardless of platform, enabling these layouts to work with backend packages (such as HIDrogen) that implement the XInput device interface on normally-unsupported platforms.
• Overhauled haptics interfaces and implementations to fix issues, de-duplicate output commands, and update Santroller haptics to their latest revision.
• Overhauled 4-lane drumkit velocity handling to correctly handle pad+cymbal hits of the same color.