xcwds docs

Make private, offline-first apps from a config file and plugins.

An @xcwds app is a static site that installs like an app, works offline and keeps what people save on their device. You describe it in one config file, and every feature is a plugin, as in Fastify. This site is one: install it, and the docs work offline.

npm create @xcwds my-app

Not on npm yet: Getting started shows how to try it from a clone until the first release.