Currently 3D assets are shown in assets view because a proxy file is generated for them. Instead generating a proxy file, we should have a custom section/model for them in assets view where we read the information directly from the generated module.

We could also use the same logic with composed effects, where currently the effect descriptor file is saved into the project content but the effect itself resides in generated module. If we could save the effect descriptor file into the generated module it would make things cleaner.

Supporting old project with 3D proxy files should be trivial, as proxy files are already automatically synced to generated modules - we could just adjust the code to always delete found proxy files.

Supporting old projects with composed effects is trickier, as we can't just delete the effect descriptor files, and if we move them to the module, opening the same project in older QDS is problematic.