Add a couple additional image file extensions

[boomshroom]

Even if they aren't supported by default on most browsers due to a certain project that shall not be named, I would appreciate the IPFS webui recognizing that my library of JPEG-XL images as images. I also decided to add QOI while I was at it.

If anyone has any other extensions they'd want to have added, I am more than welcome to do so.

[welcome]

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