Add back zune-image backend. #102
Description
When we switched to the roseate-core for image loading the experimental zune-image backend was not re-implemented for the library as other tasks that were more important required more attention from me. So I merged the roseate-core pr (#91) regardless of implementing the experimental backend.
This issue is to track the progress of bringing it back.
Also #87 requires to be implemented alongside this issue.