Static site with interactive examples

[keynmol]

Premise: it would be great to have a static website with documentation published for Laminar.

To make this work the following things need to happen:

• mdoc's :js modifier should be able to support SJS 1. PR on mdoc is halfway there, I've started completing it

  mdoc PR has been merged: Support Scala.js 1.x scalameta/mdoc#381

• Laminar's build needs to be modularised to enable mdoc and Docusaurus plugin (work started here), the site generation works with locally published custom version of mdoc (see screenshot below)

• CI pipeline needs to be adjusted to basically push entire contents of website/build (after sbt 'docs/docusaurusCreateSite') to gh-pages branch

• optional custom color scheme and logo need to be chosen for Laminar site

• Github Pages needs to be enabled and point at gh-pages branch of this repo

• optional a custom domain needs to be configured to point at github pages.

After that it's all about populating the docs with lots of interactive examples.