Kernel: pole-free six-patch spheres; vendored truck-shapeops with robust meshing and nearest-parameter loop projection (sphere and box booleans work); least-squares sphere classification

Oracle: 25/29 (14 and 15 now match Fusion).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01AS5Tn3xieewUSg3uxrMVdL

vendor/truck-shapeops/src/transversal/mod.rs

@@ -0,0 +1,7 @@
+mod divide_face;
+mod faces_classification;
+mod integrate;
+mod intersection_curve;
+mod loops_store;
+mod polyline_construction;
+pub use integrate::{and, or, ShapeOpsCurve, ShapeOpsSurface};