Convert cli to esm

[mshima]

---

Please make sure the below checklist is followed for Pull Requests.

• All continuous integration tests are green
• Tests are added where necessary
• The JDL part is updated if necessary
• jhipster-online is updated if necessary
• Documentation is added/updated where necessary
• Coding Rules & Commit Guidelines as per our CONTRIBUTING.md document are followed

When you are still working on the PR, consider converting it to Draft (below reviewers) and adding skip-ci label, you can still see CI build result at your branch.

[Tcharl]

Awesome! Thank you so much: the internals of esm are so hard to get.
Why is it WIP? not ready to merge?

[mshima]

Still needs some work.

[mshima]

Further improvements can be done later.
Should be ready now.