feat: JXL support

[Quackdoc]

What is it?

• [ ] Bugfix
• [x] Feature
• [ ] Codebase improvement

Description of the changes in your PR

• added JXL to image types required for fossify gallery

Fixes the following issue(s)

• Partially Fixes FossifyOrg/Gallery/issues/3

Acknowledgement

• [x] I read the contribution guidelines.