* Add craft-drawingml: units, colours, preset shapes, custom geometry and text warps
The parts of DrawingML that need no document model, moved from DeckCraft
(60f91f78): crates/color, crates/geom (preset, warp, Xfrm and the EMU
conversions) and crates/pptx/src/custgeom.rs with CustomPath from
crates/model.
The code is unchanged except that custgeom reads craft-xml trees and writes
to a craft-xml Writer instead of DeckCraft's own XML helper, and matches
elements by local name. The 59 tests of the moved code come with it; six
more cover the custom geometry limits.
* drawingml: evaluate a custom geometry's guide lists once per coordinate space
read_cust_geom rebuilt Guides and evaluated avLst and gdLst again for every
path: up to 1,000 paths times up to 10,000 guides, each name copied and
hashed.
Guides are now cached per path coordinate space (w, h). At most 16 spaces
and 4 MiB of guide names are kept per geometry; paths in further spaces are
left out. The first space is always kept, and a geometry without guides is
not capped.
Ported from storytold/deckcraft#1789. A list counts as having guides only
when it has gd children, as that PR's review asked.
Dylan M. Taylor
ccd0046430