Why is there both a dist and a dist_esnext folder?

The dist folder is the output of the tsc command. It is the transpiled code from TypeScript to JavaScript. The dist_esnext folder is the output of the tsc --module esnext. We need the esnext folder because vite requires ES6 modules. The dist folder is used for the rest of the project (mostly the server side of things) which is still using CommonJS modules.

Eventually we will be able to remove the dist folder and just use the dist_esnext folder but we need to make sure that the rest of the project is ready for ES6 modules first.