Loads a single .glb/.gltf model file and inserts it into the Cesium scene and layerCollection,
handling placement, orientation, uniqueness, and editing initialization.
Initializes object edit mode, shows the model in the UI, and schedules camera fly-to.
Loads a single .glb/.gltf model file and inserts it into the Cesium scene and layerCollection, handling placement, orientation, uniqueness, and editing initialization. Initializes object edit mode, shows the model in the UI, and schedules camera fly-to.