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.

tools/nodes/arrangement/dimensions.py

@@ -22,6 +22,8 @@ def visible_socket(socket):
 
 def estimate_node_dimensions(node):
     """Reserve socket rows, expanded vector values, and node-specific controls."""
+    if node.bl_idname == "NodeFrame":
+        return NodeDimensions(node.width, node.height, {})
     if node.bl_idname == "NodeReroute":
         return NodeDimensions(16, 16, {socket: 8 for socket in (*node.inputs, *node.outputs)})
     inputs = [s for s in node.inputs if visible_socket(s)]