add ability to spawn pen from hud (replacing the space bubble toggle); disable space-bubble as default

various updates to support moving the duck and pen into the gltf-component data of the environments instead of hubs.html and getting rid of interactable-template again

resolution and gets loading indicators

add/remove interactable class instead of changing scale and handle rotation correctly with super-spawner; point to duck gltf model in assets repo (and remove scale set in the html)

switch the super-hands on the controllers back to using action_grab/action_release and support that properly in cursor-controller.