Include TouchSensor by default

[srmagura]

The DndContext documentation states that only the Pointer and Keyboard sensors are enabled by default. Why isn't TouchSensor included by default? Does it cause some negative side effects when not on a touch device?

Ideally, dnd-kit would support mobile devices out of the box without any additional configuration.

[clauderic]

Touch devices are supported out of the box via the Pointer sensor.

Pointer events are designed to create a single DOM event model to handle pointing input devices such as a mouse, pen/stylus or touch.

The TouchSensor is available if you need to support browsers that don't have support for Pointer events or if you'd like different activation constraints for touch devices than mouse devices.

[srmagura]

Thanks for the clarification. Please see issue #435.