Asset Key property type

The Asset Key property type is just like a simple String property type, but it allows to open a dialog with all the Asset Pack file keys defined in the project. Then, when you select a key in the dialog, it will be set as value to the property.

The scene compiler generates Asset Key properties like this:

class Dragon extends Phaser.GameObjects.Sprite {

    constructor(..) {
        ...
    }

    /** @type {string} */
    myAssetKey = "acorn-3";
}