mesh: projection blocking — block topology, projection onto the B-rep, elliptic smoothing (#399)

A block topology (carved grid, butterfly and seven-block sphere templates,
O-grid, extrude, connect) projected onto a body: outer block faces onto their
smooth face groups, edges onto the curve of two targets and vertices onto the
point of three by tangent-plane iteration, nodes by transfinite interpolation,
then Winslow smoothing with the boundary on the geometry and a compass search
on the worst elements.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01UhhZMBTviDQxZvwnyP89fo

crates/mesh/src/lib.rs

@@ -16,6 +16,7 @@ pub mod mirror;
 pub mod nodes;
 pub mod octree;
 pub mod planar;
+pub mod project;
 pub mod quad;
 pub mod quality;
 pub mod relax;