Trackpad Gesture Support

[JakkuSakura]

Currently, the on_scroll_wheel_event supports 2 modes: by mouse wheel and by two-finger up/down. This is a bare minimum, yet many apps support other gestures:

• two-finger scroll left/right
• two-finger zoom in/out

Is it possible to support these in gpui?

[arguiot]

I face similar issues, and a lot more "event types" could be added. I've added some details in this discussion: #31391