feat: poly info command with the basics

a poetry poly info command with the basic functionality:
count number of projects, bases and components.

Add a README.md when creating a new Polylith workspace

Merge pull request #1 from DavidVujic/generate_readme

Add a README.md when creating a new Polylith workspace

fix: generate a project specific pyproject.toml without an empty readme section

readme = "" will cause a build failure.

fix: use same python version requirements as the Poetry tool

docs: add temporary workaround for how to install plugins into the so…

…mewhat broken preview of Poetry

First release!

Containing basic functionality:

• create a new Polylith workspace
• create a component
• create a base
• create a project