Procedural Wood

[Starry316]

Add a procedural wood material node graph (wood3d) which includes following custom nodes/node graphs as its components:

• two custom noise node (wood3d_util_noise1d and wood3d_util_hashnoise2d),
• a custom node for wood pore calculation (wood3d_util_pore_impulse), and
• many sub-graphs that improve readability / help reduce complexity of the wood3d node graph.

This commit also contains a 3dwood_prests.mtlx which has many pre-defined parameters that helps to create different types of wood.

[zicher3d]

I see the comments on defs file about the subgraphs with single-use. I'm still of the opinion we should remove them. Let's discuss on slack or in a quick meeting.

[zicher3d]

Just for the record (no need to add anything now). The defs should include a namespace="adsk" like for Prism nodes when final. My Legacy Protein defs also lack the namespace now, and the reason is that there is a bug in Graph Editor that prevents nodes with a namespace to be created. That's reason enough to skip, as it makes working and debugging the nodes basically impossible. But if we are tracking issues in Jira or somewhere else, we should put this in the list.

[zicher3d]

We have a few instances of Graph Editor auto-naming of nodes that are misleading (in sub-graphs). Example: "ray_combine2_vector3", which is a combine 2 floats into a vector2. In many cases the last part (the type, like "_vector3" in the above sample) can always be removed, but doing it now is a bit difficult. This is just for readability, low priority.