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.

src/anyimage/operators/convert_to_plane/object.py

@@ -67,8 +67,12 @@ def create_depth_plane_object(
     material,
     depth_image,
     depth_metadata,
+    plane_type,
 ):
-    node_group = load_node_group("O Image Depth Plane")
+    node_group = load_node_group({
+        "DEPTH": "O Image Depth Plane",
+        "RELIEF": "O Image Relief Plane",
+    }[plane_type])
     source_name = source_object.name
     bounds = image_empty_bounds(source_object)
     mesh = create_image_plane_mesh(source_name, bounds)
@@ -80,7 +84,7 @@ def create_depth_plane_object(
         plane = bpy.data.objects.new(source_name, mesh)
         context.collection.objects.link(plane)
         plane.matrix_world = build_image_plane_matrix(source_object.matrix_world, bounds)
-        plane["anyimage_mesh_shape"] = "DEPTH_PLANE"
+        plane["anyimage_mesh_shape"] = f"{plane_type}_PLANE"
 
         modifier = plane.modifiers.new(name=node_group.name, type="NODES")
         modifier.node_group = node_group
@@ -108,6 +112,7 @@ def create_depth_plane_object(
 
 
 def create_depth_plane_from_result(context, result, operator):
+    normal_space = {"DEPTH": "OBJECT", "RELIEF": "TANGENT"}[operator.plane_type]
     source_object = require_image_empty(operator.source_object_name)
     color_image = load_color_result_image(source_object, result.directory)
     color_image.name = color_data_name(source_object)
@@ -122,16 +127,14 @@ def create_depth_plane_from_result(context, result, operator):
             depth_metadata,
         )
         normal_image = load_normal_result_image(
-            result.file("tangent_normal"),
+            result.file(f"{normal_space.lower()}_normal"),
             source_object,
         )
         material = create_image_material(
-            source_object,
+            source_object.data,
             color_image,
-            0.0,
             normal_image=normal_image,
-            normal_space="TANGENT",
-            ior=1.2,
+            normal_space=normal_space,
             scene=context.scene,
         )
         create_depth_plane_object(
@@ -141,6 +144,7 @@ def create_depth_plane_from_result(context, result, operator):
             material,
             depth_image,
             depth_metadata,
+            operator.plane_type,
         )
     except Exception:
         if material is not None and material.users == 0:
@@ -149,6 +153,6 @@ def create_depth_plane_from_result(context, result, operator):
             if image is not None and image.users == 0:
                 bpy.data.images.remove(image, do_unlink=True)
         raise
-    label = "Convert to Depth Plane"
+    label = f"Convert to {operator.plane_type.title()} Plane"
     if "FINISHED" not in bpy.ops.ed.undo_push(message=label):
         raise RuntimeError(f"Unable to create the {label} Undo step")