feat: Implement weight cutout boundary smoothing for image depth cutout

- Added a new proposal for boundary smoothing in the weight cutout process, differentiating between Split edges and Outline smoothing requirements.
- Introduced a new capability `cutout-boundary-smoothing` to control smoothing strength and default values.
- Updated specifications to define the behavior of boundary-specific smoothing strength and default settings.
- Created tasks to verify the implementation of boundary behavior and asset updates.
- Developed comprehensive tests for depth symmetry and normal scaling to ensure expected behavior and performance.
- Introduced new attributes for normal mapping to facilitate persistent face attributes sharing between depth symmetry and image materials.
- Built a new node group for O Image Depth Symmetry, integrating the new smoothing capabilities and ensuring compatibility with existing workflows.

tools/nodes/preview/export.py

@@ -46,7 +46,7 @@ def _node_group_data(node_group):
             label = prop.enum_items[value].name if prop.type == "ENUM" and value in prop.enum_items else str(value)
             settings.append(label)
         title = node.bl_label
-        if node.bl_idname == "GeometryNodeGroup":
+        if node.bl_idname in {"GeometryNodeGroup", "ShaderNodeGroup"}:
             title = node.node_tree.name
         elif hasattr(node, "operation") and settings:
             title = settings[0]
@@ -120,7 +120,7 @@ button,select { padding: 8px; font: inherit; max-width: 100%; }
 
 
 def main():
-    """Build and arrange geometry assets in memory for preview."""
+    """Build and arrange node assets in memory for preview."""
     parser = argparse.ArgumentParser(description=__doc__)
     parser.add_argument("--output", type=Path, required=True, help="Output HTML path")
     parser.add_argument("--fragment", action="store_true", help="Write a fragment for an inline preview")
@@ -130,7 +130,7 @@ def main():
     from ..arrangement.arrange import arrange_nodes
 
     bpy.ops.wm.read_factory_settings(use_empty=True)
-    node_groups = [node_group for node_group in build_node_groups() if node_group.bl_idname == "GeometryNodeTree"]
+    node_groups = build_node_groups()
     for node_group in node_groups:
         arrange_nodes(node_group)
     print(write_node_preview(node_groups, output_path, fragment=args.fragment))