Handle ceramic links in content

[isidorosp]

We should parse displayed content so that if ceramic docs/streams are encountered we can display them as clickable links.

possible package for this:
https://github.com/tasti/react-linkify (implements https://github.com/markdown-it/linkify-it)
https://github.com/Soapbox/linkifyjs

OED also mentioned in Discord that there's perhaps (or will be) a method to check for DIDs in text?
the DocID class should have a similar interface though to check if it's a ceramic uri