oven-sh/bun ? reverse-engineered prompt

I want to create an all-in-one toolkit for JavaScript and TypeScript development. The main goal is to make everything incredibly fast. I'm tired of juggling Node.js, npm, a separate test runner like Jest, and a bundler like Webpack.

Build me a single command-line tool that does all of that. It should be a new JavaScript runtime that can serve as a drop-in replacement for Node.js, but with much better performance—think faster startup times and lower memory usage. It needs to support TypeScript and JSX a.k.a React files out of the box, no configuration necessary.

This tool should also act as its own package manager for handling dependencies, a built-in test runner, and a production bundler. The whole thing should be one single, fast executable written in a low-level language for maximum speed.