Apply hierarchy transformations while loading scene

The asset loader currently ignores scene hierarchy and manages everything as if it was flat. This needs to be changed to support a wider range of asset files.

added 🔧 Refactoring 🚚 Asset Loader labels

Changes to fix this issue should also be applied to the new function in the scene module creating an acceleration structure from the scene graph. This might be something to utilize creating the top-level acceleration structures (forward the transformation matrices of each node for example - maybe even provide the scene graph structure).

Anyway this issue is necessary to fix for loading more complex scenes.

mentioned in issue #146