rust-lang/rfcs ? reverse-engineered prompt

Build me a clean documentation site for the Rust RFC process using the markdown files in this repo. It should feel like an official handbook, with a homepage, a table of contents, and easy navigation between the main process guide and the language, library, and compiler change guidelines.

I want the site to read well on desktop and mobile, and to make it easy for someone to understand when an RFC is needed, how to write one, how review works, and what happens after that. Keep the content organized from the existing markdown files, and make the book pages look polished and consistent.

If you need to check the current docs or best practices online while building it, go ahead. Please make sure the result is simple to browse, fast to load, and ready to publish as a public reference for contributors.