[poetry] Entry points not converted to scripts

[Marco Sulla]

You can also, and this is the preferred way, install it in the venv
and use it in the venv.

When you activate the venv shell, you can `pip install` anything you
want. The packages will be installed inside the venv, and you don't
need any PYTHONUSERBASE or PYTHONPATH. The venv already manages this.

If you think it's easier to have global installed packages (as I
thought), probably you'll change your opinion with some years of
experience.