chore(build): drop CommonJS (CJS) build

[ghiscoding]

Summary

drop CommonJS (CJS) build since it's no longer necessary and NodeJS now allows to require(esm) anyway

Why

to decrease the size of our lib being published to npm

Validations

run a prod build and also ran dev watch server

AI / LLM assistance

• AI / LLM assistance used:
  • No
  • Yes
• If Yes:
  • which tool/model:
  • how was it used:

Checklist

• The changes are limited to only one scope (if not please explain why in the comments above).
• Tests were added or updated where appropriate.
• Documentation was updated where appropriate.

[ghiscoding]

@6pac small PR to drop CJS build, I'll do a follow-up PR to remove the dist/ folder in another PR.

Side note, I guess you could start rebasing the drop SortableJS if you want to start with that.
Cheers