Supporting non-docker v1 manifest (format oci, v2s1, v2s2)

[nicotruc]

Hi,

As there is more and more non docker based image (with manifest format oci, v2s1 or v2s2 as there are downloadable using skopeo), it would be a great feature to implement a way of taking these manifest into account instead of a docker v1 version of manifest, as the tools seems to load