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/arrangement/branches.py

@@ -1,4 +1,4 @@
-"""Identify connected field calculations by their nearest geometry consumers."""
+"""Identify connected calculations by their nearest geometry or shader consumers."""
 
 from collections import defaultdict
 from graphlib import TopologicalSorter
@@ -17,7 +17,8 @@ def calculation_blocks(nodes, edges):
         i
         for i, n in enumerate(nodes)
         if n.bl_idname == "NodeGroupOutput"
-        or any(s.type == "GEOMETRY" and s.is_linked for s in n.outputs)
+        or n.bl_idname in {"ShaderNodeNormalMap", "ShaderNodeBump", "ShaderNodeDisplacement"}
+        or any(s.type in {"GEOMETRY", "SHADER"} and s.is_linked for s in n.outputs)
         or getattr(n, "paired_output", None) is not None
     }
     inputs = {i for i, n in enumerate(nodes) if n.bl_idname == "NodeGroupInput"}