tq-threads v0.2.0 — feature-parity clean-room thread library

First public release of tq-threads: a clean-room, MIT-licensed (GPL-2.0-compatible) OpenSCAD thread library.

Highlights

• ISO metric + Unified threads as a single watertight polyhedron (manifold by construction)
• Presets M2–M64 coarse + common fine + UNC/UNF
• Hardware: bolts, hex/countersunk/wood screws, nuts, washers, standoffs, couplers
• Holes: tapped, clearance (ISO 273), counterbore, countersink
• Printable-first: clearance fit, lead-in chamfers, rounded roots, real $fn/$fa/$fs
• Full validation (assert), split fast/heavy tests + CI, README + MANUAL + diagram

See CHANGELOG.md and README.md.