Create a prop reparenting module

[JonnyOThan]

@kurgut has a use case where he wants to animate a group of props. The easiest way to do this would be if they were all attached to a common parent. FreeIVA can do this, but it’s tricky because you have to use the transform name inside the prop and reference them by index.

RPM should create a small module that can be added to prop placements to reparent them at load time. But it can use a semantic ID instead of indexing so it’s not so fragile.