emilkowalski/sonner ? reverse-engineered prompt

Build me a clean opinionated toast library for React. Users should install the package then drop a single Toaster component near the root of their app. After that they can import toast and call it from anywhere with a simple message like toast My first toast or toast success Great job.

The notifications need to look modern with smooth animations that feel premium. Keep everything in TypeScript, add a small website folder that demos all the common ways to use it, and make sure the defaults are beautiful so most people dont need to tweak much. Set up the full project with tests and proper packaging so it works like a real npm library.