[Two-Fer] Remap Pylint Warnings about Docstrings from ACTIONABLE to INFORM

[BethanyG]

Currently, pylint feedback for this exercise flags comments about missing module and method/function docstrings as ACTONABLE.

We should re-map these to INFORM comments instead, and have those comments link to docs that describe why docstrings are important, in addition to a docstring concept exercise, when it is ready.