Adds support for tracking the specific mouse button used during
drag-and-drop operations. This includes a new `ALTBUTTON` event type
to handle cases where a different button is pressed while a drag is
already in progress, and disables the browser context menu by default
in the Phaser configuration to prevent interference.
Introduce `addEffect` to `DisposableBag` to encapsulate Preact
signal effect creation and disposal. Update `ReactiveScene` to use
this method, simplifying effect management and ensuring proper
cleanup.
dragDropEventEffect
Replace Phaser event emissions with a `DragDropCallback` in
`dragDropEventEffect` to provide a more explicit and type-safe API
for handling drag-and-drop interactions.
Attach pointerup and pointermove listeners to scene.input
for reliable tracking. Emit dragstart, dragmove, and
dragend events alongside drag. Rename relativeX/Y to
deltaX/Y in DragDropEvent and integrate DisposableBag.
hypercross