feat: add support for OpenRaster (ora) format #81
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What is an OpenRaster File?
spec reference
OpenRaster is an exchange format between layered photo editing programs. It is supported by GIMP, Krita, imagemagick, Scribus, and others. A GIMP project can be exported as OpenRaster, and then opened in Krita for example.
testdata/sample.orawas generated in GIMP, and is the usual cat image, but with a reflection.Expanding the OpenRaster as a zip reveals a transparent directory structure.
Detection
OpenRaster is zip wrapped with unencrypted mimetype file containing "image/openraster".