v0.3.1

v0.3.1

Added

• PNG raster export — --format png on the CLI, or Drawing.export(formats=("png",)). Rides the SVG→PDF→PNG chain via pypdfium2 (Google PDFium, BSD-3) + Pillow (HPND) — permissive, pure-wheel, no native cairo, dual-license-clean.

Changed

• Unified export API — Drawing.export(out, *, formats=…, dpi=…) → {format: path}. Intermediate SVG/PDF are routed through a temp dir, so exporting one format never clobbers another format's existing output.

Deprecated

• Drawing.export_pdf() (use export(formats=("pdf",))) and the legacy positional export(svg=, dxf=) tuple form.

Also lands the #635 consolidation epic (all six children) — internal, behaviour-preserving (byte-identical golden), no output change.