* finished & cleaned up modifier deep scan: works well !
* now toggleable via a setting
* same for the deep scan for materials
* rewrote the very messy materials scan, with a much improved generic_fields_hasher
* still need to add back an improved material node tree serializer
* fixed overhauled, cleaned up and improved settings change detection
* serialize_scene now generate a hash per object instead of keeping the details (useless)
* changed handling of gltf settings, so that only the actual non default, changed settings are saved
* a ton of minor changes & cleanups to get export working correctly: it works !
* started adding materials_in_depth_scan (wip) to be able to control more detailed (but costly) materials diffing for change detection
* migrated gltf settings handling to the new "generate_complete_settings_dict" helper
* tweaks/fixed to the internals of that function to get the actual correct data
* minor related tweaks & fixes
* restructured component settings to be used instead of the registry
* removed settings from registry
* fixed data access for the above
* added saving of component parameters
* added component settings pointer in blenvy core
* added loading of both auto_export & component settings in blenvy core's load_settings
