Look into asset hot reloading

[kaosat-dev]

• in Bevy 0.11 there where a lot of very weird issues with gltf asset hot reloading
• the "piggyback on gltf" nature of this tooling means there is a need to do more than just reload mesh data on asset change
• this needs to be explored further & implemented in some form

Possible issues:

• the long term goal is to NOT keep Gltf handles around (inefficient), so that might clash with hot reload
• last I checked mesh/scene reload from gltf assets was broken in Bevy