Allow filtering which types go into the exported registry

[janhohenheim]

I assume that's what the ExportComponentsConfig will be for, but all of its members are currently not pub and not implemented yet.

What would be useful to me would be to have an allowlist of registered types that will be exported. Most registered types are not relevant for my Blender workflow, but can disrupt my design via name conflicts.
For example, if XPBD's Collider ever does into the type registry, we will run into problems with the current recommendation (per the examples) of having an own Collider type that is used in Blender.