Expose finger curl & transform data

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Assuming that the OpenXR skeletal input system also works with with controllers that aren't the index controllers, would it be possible for there to be a node that is a part of the XROrigin node that exposes copies or raw output data that can be used to apply to hand rig positions and rotations, or at the minimum, expose finger curl data that can be used to pose hands that don't conform to the OpenXR specifications on skeletal tracking?