This commit adds an updated version of the old attribute transfer node.
It works like a function node, so it works in the context of a
geometry, with a simple data output.
The node has a new "Index" mode, which can pick data from specific
indices on the target geometry. The implicit default is to do a simple
copy from the target geometry, but any indices could be used.
Copy the position of one geometry to another, the data types don't matter
Output color data from a noise texture transferred from another geometry
