adding pylint.yml workflow, which runs pylint on all the python code in the repo

[edwardhartnett]

DESCRIPTION OF CHANGES:

• Add pylint workflow
  This runs pylint on your python code, which finds a lot to complain about, not all of which will be important, but PEP8 compliance is very usual on python projects, and a great idea. pylint checks for PEP8 compliance. For more info see: https://realpython.com/python-pep8/#:~:text=PEP%208%2C%20sometimes%20spelled%20PEP8,and%20consistency%20of%20Python%20code.

I put this up to demonstrate the potential. It's a good idea to put the unit tests in place before trying to clean up all the warnings.

TESTS CONDUCTED:

As seen in CI.

Machines/Platforms:

N/A

Test cases:

N/A

ISSUE:

• Part of how can unit tests and CI be added to the repo? #453

CONTRIBUTORS (optional):

In cooperation with @BenjaminBlake-NOAA