Add more docstrings and type hints

[jan-janssen]

This is the second part following #1640

[samwaseda]

I’m not sure if I’d import argparse just for the type hinting. Don’t you want to do a string type hinting?

[jan-janssen]

I’m not sure if I’d import argparse just for the type hinting. Don’t you want to do a string type hinting?

In pyiron_base.cli.control the argparse package is required to parse the command line arguments. The other command line interfaces in pyiron_base.cli.* are only imported in pyiron_base.cli.control, so it does not matter if we already import argparse in the command line interfaces of in pyiron_base.cli.control, the number of modules imported when using one of the command line utilities remains the same.

[samwaseda]

Just a nit otherwise it looks good to me