* Add craft-kra: Krita archives, maindoc.xml and tiled pixel files, from PhotoCraft
The format half of PhotoCraft's Krita import (crates/io/src/kra.rs and kra/tiles.rs at
abeb16c96): the archive and its mimetype, maindoc.xml as a tree of nodes with the attributes
Krita writes, the tiled pixel files and their LZF compression. The mapping onto a document
(blend modes, surfaces, warnings) stays in the app.
maindoc.xml is read with craft-xml and the archive with the zip crate.
* craft-kra: a default pixel is read under a one-pixel limit
The .defaultpixel member (1 to 8 bytes) was inflated under the 1 GiB layer-file limit before
its size was checked.
Ported from storytold/photocraft#11138.
* craft-kra: the tile table is not reserved from the declared count
A tiled file may declare one record per eight bytes of its size. Reserving that many up front
is 3 GiB for a 1 GiB member that holds none of them. Reserve 65,536 records at first and grow
as records are read, never past the declared count.
Ported from storytold/photocraft#13309.
