Add Q# with Python host program template

[ricardo-espinoza]

Is your feature request related to a problem? Please describe.
Selecting a single template for Python+Q# would be a convenient addition to simplify the creation of both the host program and the Q# library for our users.

Describe the solution you'd like
Adding a new template to the VS Code extension that directly creates a Q# library together with the pre-configured Python host program via the command palette. See original proposal in #1052

Additional context
This could be extended to Visual Studio and command line templates too.

[cgranade]

Additional context This could be extended to Visual Studio and command line templates too.

For command-line templates, could look at using cookiecutter; that project is pretty popular in the Python community. Alternatively, we could separate the yeoman templates from the VSCode extension a little more and allow people to use npm to template, but at the cost of requiring another dependency.