Implement arrangement framework for node groups

- Introduced `frames.py` to manage field complex calculations and their arrangement within node groups.
- Added functionality to create and remove field frames based on node arrangements.
- Developed `passages.py` to find unobstructed paths for connections around calculation frames.
- Implemented `references.py` to route shared results on peripheral tracks, ensuring efficient distribution of outputs.
- Created `sections.py` to reserve space for field calculations adjacent to geometry consumers.
- Added `sources.py` to position shared calculation sources effectively beside their distribution channels.
- Enhanced outline smoothing with `outline_smoothing.py` to adapt camera depth along original outlines.

tests/anyimage/operators/test_cutout_depth.py

@@ -31,7 +31,7 @@ def test_depth_cutout_loads_boundary_blur_revision_and_preserves_existing_group(
     saved = bpy.data.node_groups.new("O Image Depth Cutout", "GeometryNodeTree")
     saved["anyimage_asset_revision"] = 11
     current = load_cutout_node_group("DEPTH_SOLID")
-    assert current != saved and current["anyimage_asset_revision"] == 18
+    assert current != saved and current["anyimage_asset_revision"] == 23
     assert saved in bpy.data.node_groups.values()
     assert saved["anyimage_asset_revision"] == 11
     assert load_cutout_node_group("DEPTH_SOLID") == current