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/check.py

@@ -9,7 +9,7 @@ ASSET_PATH = Path(__file__).resolve().parents[2] / "src/anyimage/assets/O_AnyIma
 GEOMETRY_NAMES = {
     "O Image Depth Panorama",
     "O Image Plane", "O Image Depth Plane", "O Image Relief Plane",
-    "O Image Cutout", "O Image Depth Cutout", "O Image Depth Balloon",
+    "O Image Cutout", "O Image Depth Cutout", "O Image Depth Symmetry",
 }
 SHADER_NAMES = {"O Image Layer", "O Image Depth Layer", "O Shadeless"}
 
@@ -60,6 +60,8 @@ def check_asset_library(asset_path):
         values = {"Subdivide": 0, "Thickness": 0.2, "Reference Depth": 2.0,
                   "Depth Image": depth_image, "Uniform Scale": 1.0, "Normal Smooth": 0,
                   "Depth Split": 0.0}
+        if node_group.name == "O Image Depth Symmetry":
+            values["Reference Depth"] = 2.5
         for item in node_group.interface.items_tree:
             if item.item_type == "SOCKET" and item.in_out == "INPUT" and item.name in values:
                 modifier[item.identifier] = values[item.name]