Volumetric timber shader

This is a timber shader working on the cross-section wood textures.
The textures are projected along the wood fibers in either world or local axis.
The projection matrix is included inside the material properties.
A dedicated shader gui contains a picker to get the fibers direction from a selected mesh edge. The pick point position and normal define the mapping origin and orientation.
The shader features:
- planar projection in world or local object space, no uv required
- timber grain direction picker
- builtin, URP, HDRP support
Note:
URP and HDRP is supported for Unity versions above 2021.2.0.
The assets specific for scriptable render pipelines are located inside separate unitypackages.