Fossify Gallery on the official F-Droid repo

The removal isn’t directly related to the buyout/fork. Simple Gallery was taken off of F-Droid due to a dependency on the nonfree Google VR being discovered by IzzySoft¹ ². Fossify’s fork has removed the dependent features to be compliant³.

1. https://gitlab.com/fdroid/fdroiddata/-/merge_requests/14284
2. https://github.com/FossifyOrg/Gallery/issues/36
3. https://github.com/FossifyOrg/Gallery/issues/36#issuecomment-1873458105