Adds TessPlan and the kernel planner (shared edge nodes, structured and Coons grids, constrained Delaunay for trimmed faces) behind Body::display_plan. Nothing drawn changes yet. Refs #303 Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Adds TessPlan and the kernel planner (shared edge nodes, structured and Coons grids, constrained Delaunay for trimmed faces) behind Body::display_plan. Nothing drawn changes yet. Refs #303 Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>