Add the Quite OK Image Format (QOI) …maybe eventually

[Schweinepriester]

• https://qoiformat.org/
• Spec: https://qoiformat.org/qoi-specification.pdf
• https://github.com/phoboslab/qoi
• https://en.wikipedia.org/wiki/QOI_(image_format)
• Firefox: https://bugzilla.mozilla.org/show_bug.cgi?id=1765908