feat: Initial release v0.1.0
STP/STEP 3D viewer (WPF, .NET 8) - CADability + HelixToolkit.Wpf:
- Multi-file import (STEP/STL/DXF) with STEP assembly tree
(per-node visibility/color cascade, zoom-to)
- Measurements: point / distance / edge / face / circle / angle /
face-to-face distance (B-rep exact where available)
- Assembly verification: two-point align (translate), 3-point align
(rotate+translate via RigidAlign), axis rotate 90, interference
check (tri-tri intersection + min gap)
- Section view (CPU mesh clipping, originals preserved)
- mm/inch toggle, CSV export (UTF-8 BOM), 2x PNG screenshot
- Performance: per-file merged edge lines, per-leaf merged mesh in
browse mode, no BackMaterial on closed solids, edge suspend during
camera interaction, parallel leaf triangulation with retry
- SmokeTest CLI: import pipeline, --tree, --clip-test,
--interference-test, --align-test (all passing)
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>