Support adding components to collections

Blenvy already replicates scene structure in Blender, including collections. It also lets you add components to those collections in Blender; however, those items won't show up in Bevy. It seems to be a expected behavior, but if it wasn't intended, I believe it could be a valuable feature. Blenvy version: 0.1.0-alpha.1 Bevy version: 0.14.2 Blender: 4.2.3