Complete the tsup configuration so that it generates almost the same package as it does now for npm

[aanthonymax]

Now, in the package folder, the package generation goes a little different from what is currently in npm. You need to fix the config and do it like now on npm. The dist folder contains the generation of min, regular main.js and runtime.

Config - https://github.com/hmpl-language/hmpl/blob/main/tsup.config.ts

NPM package - https://www.npmjs.com/package/hmpl-js?activeTab=code