feat: Implement depth cutout symmetry and associated functionalities

- Introduced a new proposal for depth cutout symmetry, allowing for the reuse of depth replacement and geometry operations.
- Added requirements for maintaining default thickness values for cutout nodes and ensuring proper initialization during object creation.
- Enhanced symmetry node to handle existing geometry, including alignment, mirroring, and boundary filling.
- Implemented fill smoothing to control the geometry of generated walls while preserving original surfaces.
- Created tests to validate the functionality of the new symmetry features against baseline geometry.
- Updated existing assets and node groups to support the new symmetry capabilities without introducing additional dependencies.

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 Symmetry",
+    "O Image Cutout", "O Image Depth Cutout", "O Image Cutout Symmetry",
 }
 SHADER_NAMES = {"O Image Layer", "O Image Depth Layer", "O Shadeless"}
 
@@ -60,8 +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
+        if node_group.name == "O Image Cutout Symmetry":
+            values["Depth Offset"] = 0.5
         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]