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/server/test_panorama.py

@@ -89,7 +89,7 @@ def test_job_outputs_geometry_combines_alpha_once_and_skips_transparent_views(pa
     metadata = json.loads((context.directory / result["depth_metadata"]).read_text())
     assert metadata["projection"] == "equirectangular"
     assert metadata["image_size"] == [64, 32]
-    assert metadata["reference_distance"] == pytest.approx(3, rel=1e-5)
+    assert set(metadata) == {"projection", "image_size"}
 
 
 def test_full_resolution_fusion_preserves_detail_and_periodic_alignment():