The bundled DRAINAGE / DRAINAGE2 definitions use the RIGHT_ARROW shape
from qcadshp.shx, which had no substitute, so they drew as continuous
lines. Add it to the bundled shape set alongside BAT, ZIG and the rest.
Fixes#665
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Restore complex-linetype embedded shapes: ltypeshp is converted from the old
CXF shape file to LFF (assets/fonts/ltypeshp.lff), with the bulge moved to the
LibreCAD preceding-segment convention. The LFF parser now keeps named shapes
(blocks whose label is a word, e.g. BOX/CIRC1/ZIG) in a separate map since
their codepoints collide, exposed via lff::shape(); complex_lt::emit_shape
draws them again at the pen position.
Missing glyphs now fall back through the chosen family -> unicode -> iso3098,
so Turkish letters (Ğ ğ Ş ş İ) render in any font (dotless ı is the lone gap
iso3098 lacks).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
