Symlink Krita files as an image file type

### Problem

Krita files currently show as a document file type, they should show as an image file type

### Proposal

symlink `image-x-generic` to `application-x-krita`

OR

Create a new kind of image document file type and symlink:
- [ ] `application-x-krita`
- [ ] `image-x-xcf`
- [ ] `image-vnd.adobe.photoshop`

### Prior Art (Optional)

_No response_