Feature/polygon simplification - #71
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Sep 23, 2026
Picks up fontanf/shape#69, #70, #71, #72 and #73, which fix the failures of the irregular instance building reported in #595 and #598: - #69: the line-segment approximation of an arc placed on its circle ended with a degenerate segment, making circular holes look self-intersecting. - #70: the fallback union of that approximation used clockwise extras for anticlockwise arcs, filling holes. - #71, #72: line/circle and circle/circle tangencies were computed as two intersections a few micro-units apart, or as none, which made boolean operations fail ("face area is not positive") or overflow the stack. - #73: no_fit_polygon merged nearly parallel edges in the wrong order, so the self-NFPs used by the periodic packing were not exact (nor centrally symmetric), which made the lattice search unions fail.
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