feature: support to print snapshot info for image

[ningmingxiao]

nerdctl -n k8s.io inspect busybox --mode=native

containerd config

  [plugins."io.containerd.snapshotter.v1.overlayfs"]
    upperdir_label = true

will show snapshot info we can find busybox image use dir /var/lib/containerd/io.containerd.snapshotter.v1.overlayfs/snapshots/3/fs

        "Snapshots": [
            {
                "Kind": "Committed",
                "Name": "sha256:134949ec8800e56aef84679127eb2da7e1d2db5c0c905268e1ba5b12f58ee06c",
                "Labels": {
                    "containerd.io/snapshot/overlay.upperdir": "/var/lib/containerd/io.containerd.snapshotter.v1.overlayfs/snapshots/3/fs"
                },
                "Created": "2026-08-01T09:29:08.733458432Z",
                "Updated": "2026-08-01T09:29:08.733458432Z"
            }
        ]
    }

todo add snapshot info for container rw layer.
@AkihiroSuda

fix containerd/containerd#10053