feat: Add new Geometry Nodes groups for image relief and shadeless shader

- Implemented the "O Image Relief Plane" Geometry Nodes group to create a fixed-base image relief using depth images and various parameters.
- Created the "O Shadeless" shader node group to display color without scene lighting while preserving shadows and reflections.
- Introduced a preview feature for node groups, allowing for interactive visualization of node arrangements in an HTML format.
- Added a template HTML file for rendering node previews with customizable views and controls.

pyproject.toml

@@ -27,8 +27,8 @@ dev = [
 
 [project.scripts]
 pack = "tools.pack:main"
-build_node = "tools.build_node:main"
-sync_models = "tools.sync_models:main"
+build_node = "tools.nodes.cli:main"
+sync_models = "tools.models.cli:main"
 docs = "tools.docs:main"
 
 [build-system]