Some nits but awesome work @dvdksn, thanks!

Nice! LGTM.
That line highlight feature makes stuff so much easier to read.

My only suggestion, for the "specify annotation level section" section, as someone not familiar with this, output of the inspect command for each example would help me visualize it better. Not very necessary because the "Annotations describe OCI image components, such as manifests, indexes, and descriptor" links helped me understand the levels, and the example in the inspect section showed a few levels with annotations.