feature: Provide the option to use system packages for poetry projects

[rnc]

Issue Details

Please provide the following details when opening an issue:

Operating System (uname -a)

Fedora 32

zsh version (zsh --version)

5.8

autoswitch-virtualenv version

echo "$AUTOSWITCH_VERSION")
<your version here>

3.0.0

How is zsh-autoswitch-virtualenv installed?

• zplug
• oh-my-zsh
• Antigen
• Other (please specify)
  Manual checkout

Steps to reproduce the issue

Would it be feasible to integrate ideas from

• https://stackoverflow.com/questions/60563438/how-to-use-system-installed-packages
• #1393 Add system site-packages support in virtualenv (again) python-poetry/poetry#1982

and provide an option to use system packages for poetry?

gist link to your zshrc

[MichaelAquilina]

Likely to be possible. This is already somewhat supported in virtualenv projects so its just a matter of extending that support.

Is the main reason to want this to prevent redundancy and improve install times?

[rnc]

Exactly that reason :-)

I tended to run as mkvenv --system-site-packages so it be useful to support some form of standardised pattern to handle this ( even if its a mkvenv specific that the processes the argument as appropriate)