* now the blender side exports .meta.ron files in addition to the gltf files
* these ron files contain the list of assets that are then preloaded on the Bevy side
* removed the double loading of gltf files on the Bevy side, replaced with use of the new metadata/asset files
* added bevy_common_assets/ ron as dependency for the file loading
* big cleanup & partial restructure of the spawning steps
* fixed premature removal of the BlueprintAssetsLoadState component that was leading to missing material gltf files in
setups withouth hot reload
* added OriginalVisibility component & logic to correctly reset the visibility of entities to what they where before
the blueprint spawning
* fixed a few not so visible issues with some components staying around after the blueprint instance has become "ready"
* moved a number of component insertions to the new "get the assets list from the meta file"
* also, loading speed feels faster ! (thanks to now loading the gltf files only once)
* minor various tweaks & cleanups
* removed file_watcher feature, should be user settable
* added root blueprintInfo path to the list of assets to watch for hot reload
* removed settable aabb calculation: they will now always be done
* added "export_registry" setting to be able to disable registry export for wasm & co (automate later)
* minor tweaks
* cleanups
* bumped up Bevy version to v0.14 !
* fixed (albeit in a clunky way) issues with sub blueprint detection
* improved error message for missing material library
* added HideUntilReady component & logic, to hide 'in-spawning' blueprint instances until they are ready
* "add-to-world" is now only trigerred for blueprint instances that have no parents (avoid footgun)
* minor cleanups & tweaks
* added test component with Vec3 to double check for issues
* updated test blend file to include the component above + added a light to the test spawnable blueprint
to check for "light flashes" (aka indirectly testing "HideUntilReady")
* fixed handling of scene gltf_extras
* fixed handling of colors for BlenderBackgroundShader
* added scene tonemapping & scene colorgrading and handling on the Bevy side.
* experimented with exporting ron asset files, updated & overhauled asset file generation, adapted
for blueprints
* various cleanups
* includes components, registry export & blueprints
* overhauled settings / config to match the new structure
* keeping the different sub plugins for now
* cleaned up some of the internals of the blueprints code
* related tweaks & cleanups
* added events to blueprints : for when assets have been loaded & when a blueprint has been spawned (wip)
* various experiments with blueprints
* updated testing to make use of new crate & logic
* tweaked & changed code where relevant
* also added support for the new gltf_xxx_extras in bevy_gltf_components
* animation support needs an overhaul given the extensive changes in v0.14 (wip)
* still a giant mess, but works
* examples not yet updated, will get overhauled
* testing project is now independant from the "common" example code: ie no debug ui, no physics,
no bevy_asset_loader
* testing project WORKS , even without any of the above, so asset loading (even if rough), is functional !
* added VERY rough hierarchy/ components debug to testing project to visualize things
without bevy_editor_pls egui & co
* related tweaks & changes
