vuejs/vitepress — reverse-engineered prompt

Build me a fast documentation site generator powered by Vue and Vite. I want people to write pages in Markdown, run a simple local preview while editing, then build the whole thing into static files that can be deployed anywhere.

Please include a clean default docs theme with a home page, top navigation, sidebar navigation, readable code blocks, mobile friendly layout, and a way to customize the theme with Vue when someone needs more control. It should feel simple for beginners, but still be useful for real project documentation.

Use TypeScript for the core code, add sensible tests where they matter, and include clear docs that explain how to start a new site, add pages, configure navigation, run the dev server, and build for production. Look up current Vue and Vite docs online if you need to.