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.
Allow `PhaserScene` to accept either a scene instance or a scene
constructor. This enables more flexible scene registration within
the `PhaserBridge`. Also updates `sceneKey` to be optional,
defaulting to the scene's internal key.
hypercross
hyper