todo

@mappum, it's okay to make it a read TODO. in fact, it's a really nice
practice since it's standard and we can grep it. When someone who
has an answer for the concern comes across the standard TODO breadcrumb,
he/she can address it. Using the conventional TODO improves
discoverability.
feat(ipfs2/config) impl show and edit as options

verified that option text hints match ipfs1 - btc
add todo