* Move all markdown into a dedicated `content/` directory
* use contentlayer (https://github.com/contentlayerdev/contentlayer) for loading markdown
* add catch all route pages/[...slug].js to generate all markdown routes using contentlayer to find pages
frontmatter now properly supported
NB: some nice side benefits like removing the hack in _app.js to render markdown template vs the general layout template
TODO: page titles need fixing