feat(cutout): implement boundary padding for cutout textures

- Introduced a new `Boundary Padding` preference in the Cutout Tool with a default of 2 px and a configurable range of 1-4 px.
- Updated the Cutout client to establish inward mapping from the final Mask, sampling in a fixed direction and processing independent material RGBA and Depth.
- Enhanced the handling of RGBA and Depth during cutout operations, ensuring proper mapping and preservation of source data.
- Added tests to validate the new boundary padding functionality and its integration with existing cutout processes.

feat(geometry): remove overall mesh smoothing from geometry nodes

- Removed the `Smooth` input from several geometry node groups to eliminate unnecessary overall mesh smoothing.
- Retained `Smooth Weight` for depth nodes while removing it from Cutout and Relief Plane nodes.
- Ensured that boundary, normal, and fill smoothing behaviors remain intact and consistent.
- Updated tests and documentation to reflect the changes in node interfaces and behaviors.

feat(normals): scale tangent normals with depth

- Reused the existing `o_normal_reduction` attribute to adjust Tangent Normal strength based on the geometry's `Depth Scale`.
- Ensured that Tangent Normal strength is consistent with the geometry depth, preserving full strength for materials that do not provide the attribute.
- Updated tests to verify the correct behavior of normal strength adjustments in both Tangent and Object Space.

tests/tools/nodes/test_arrangement.py

@@ -98,8 +98,8 @@ def _surface(node_group):
     image.pixels.foreach_set(pixels.ravel())
     values = {"Subdivide": 1, "Thickness": 0.2, "Depth Image": image,
               "Uniform Scale": 1.0, "Reference Depth": 2.5, "Depth Scale": 0.8,
-              "Smooth": 1, "Normal Smooth": 2, "Depth Split": 0.25,
-              "Depth Offset": 0.5}
+              "Normal Smooth": 2, "Depth Split": 0.25,
+              "Offset": 0.5}
     mode = None
     for item in node_group.interface.items_tree:
         if item.item_type != "SOCKET" or item.in_out != "INPUT":