Chamfers with two distances or a distance and an angle (distance2 / angle, flip for which face comes first), on straight edges between planar faces; pattern copies keep them

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

crates/kernel/src/lib.rs

@@ -37,7 +37,7 @@ mod step_out;
 mod sweep_path;
 mod topo;
 
-pub use blend::{chamfer, fillet};
+pub use blend::{ChamferSide, chamfer, chamfer_sides, fillet};
 pub use body::{Body, EdgeInfo, FaceInfo, FacePaint, Paint};
 pub use build::{PathSeg, box_solid, cylinder, extrude, extrude_tapered, loft, revolve, sphere, sweep, torus};
 pub use helix::{loft_to_point, sweep_helix};