Use react-markdown to render static pages instead and consolidate the React and Markdown files into one file

[swyxio]

as spoken via research call

https:/thinkmill/react-markings also uses CommonMark so we have full compatibility with the existing markdown flavor used in Pup, but this time it can be done purely within React so there is no preprocessing phase required. Less files, less lines of code. Also a nice bonus, we can inject code into the page with this method so it becomes less "static" than before.

[swyxio]

i am changing this to use react-markdown as it has better OSS support