Publish Markdown as web site

[sverhoeven]

Publish the README.md as a website. Try to use weave script to convert Markdown to html in docs/ directory.

[sverhoeven]

Could also look at https://www.mkdocs.org/ or https://v2.docusaurus.io/, but the html pages should render the info string of a fenced code block, to make clear how code gets entangled.