Make a microsite with organized docs

Emphasis on organized, as we continue adding clouds that each need their own docs it's going to get complicated. Not entirely sure if we'll be able to use mdoc or will need mdoc.js for the Scala.js-only modules. It's a bit of a strange situation, since mdoc.js is intended for interactive browser-based Scala.js snippets, but we'll be compiling code targeting Node.js that won't run in the browser. So not quite sure if/how that would work.

Regarding site generator, I'm amenable to Laika, which I had a pleasant experience using for http4s-dom. Also the new docs generation capabilities in Scaladoc 3 seem interesting, see https://github.com/scalameta/mdoc/issues/588#issuecomment-993498312.

Start by comparing mdoc, mdoc.js, Laika, and the Scaladoc 3 documentation capabilities mentioned in the issue, including whether Node.js-targeted Scala.js modules are supported. Define an organized microsite structure for the growing cloud-specific documentation and consider the work complete when that site can generate and present those docs consistently.