add python in shifter page and link to it from other pages
Adding a page to provide Python in Shifter examples. Part of our larger effort to help move Python users to containers.
Adds links to this page from other places in the Python documentation.
Submitters and reviewers please make sure
- internal links are relative and to the .md file
- avoid links named "here"
- alt-text for images is descriptive
- doesn't duplicate existing content
- spell check
- renders correctly
- does not include any identifiable information (real usernames, project names, etc)