Document pip install for django-pay2pay

[GRURoot]

Issue Description

Request: Add documentation or instructions for installing the django-pay2pay package using pip. Example command:

pip install django-pay2pay

Please provide details about compatibility, caveats, or prerequisite steps if any are necessary for packaging projects on the site.

Code of Conduct

• I am aware that participants in this repository must follow the PSF Code of Conduct.

[notatallshaw]

Project specific installation should be added to that projects documentation: https://pypi.org/project/django-pay2pay/

[woodruffw]

Closing as not this repo.