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.

tools/nodes/arrangement/semantics.json

@@ -0,0 +1,10 @@
+{
+  "GeometryNodeJoinGeometry": {"peer_inputs_from": 0},
+  "GeometryNodeMenuSwitch": {"peer_inputs_from": 1},
+  "GeometryNodeSwitch": {"peer_inputs_from": 1},
+  "ShaderNodeCombineXYZ": {"peer_inputs_from": 0},
+  "FunctionNodeBooleanMath": {
+    "peer_inputs_from": 0,
+    "operations": ["AND", "OR", "NAND", "NOR", "XNOR", "XOR", "IMPLY", "NIMPLY"]
+  }
+}