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/support/depth_surface.py

@@ -61,7 +61,7 @@ def surface(*, step=6.0, size=1.0, resolution=2, wrapper=False):
     for name, value in (
         ("Depth Image", image),
         ("Uniform Scale", size),
-        ("Reference Depth", size),
+        ("Reference Depth", size * (1 + step / 2)),
         ("Depth Scale", 1.0),
         ("Thickness", 0.0),
         ("Front Inflation", 0.0),