ctr: snapshots diff command
ctr: snapshots diff command

Signed-off-by: Jess Valarezo <8ddc6cb4606b3addce2babb4143c42531ebb7d3e@gmail.com>

containerd/containerd,mikebrow/containerd,thaJeztah/containerd,kunalkushwaha/containerd,dmcgowan/containerd,vdemeester/containerd,vdemeester/containerd,crosbymichael/containerd,containerd/containerd,estesp/containerd,miaoyq/containerd,thaJeztah/containerd,mikebrow/containerd,kunalkushwaha/containerd,crosbymichael/containerd,dmcgowan/containerd,miaoyq/containerd,estesp/containerd