Prod build

[JoviDeCroock]

This is the start for a production-ready build.

Do we have any requirements set for this?

[developit]

Thinking we can make our lives easier by moving away from index.js for both entrypoints here:

src/
    cli.js      # import { start } from './start.js'; import { build } from './build.js;
    start.js    # import { bundleDev }  from './bundler.js';
    build.js    # import { bundleProd }  from './bundler.js';
    bundler.js  # export { bundleDev, bundleProd }