Tracking Issue: Refactor nodes to use Kurbo instead of Bezier-rs

[indierusty]

• [x] 'Offset Path' node (#2596)
• [x] 'Solidify Stroke' node (#2608)
• [x] 'Position on Path' and 'Tangent on Path' nodes (#2611)
• [x] 'Sample Points' node (#2629)
• [x] 'Scatter Points' node (#2634, #2657)
• [x] 'Bounding Box' node (#2662)
• [x] 'Morph' node (#2696)
• [x] 'Spline' node (#2701)
• [ ] 'Area' node (#2778)
• [ ] 'Centroid' node
• [ ] 'Bevel' node (#2681)
• [ ] 'Round Corners' node
• [ ] 'Remove Handles' node
• [ ] 'Generate Handles' node