General update - add docstrings

[jonhealy1]

Related Issue(s):

• #

Description:

PR Checklist:

• [x] Code is formatted and linted (run pre-commit run --all-files)
• [x] Tests pass (run make test)
• [ ] Documentation has been updated to reflect changes, if applicable
• [ ] Changes are added to the changelog

[jonhealy1]

@gadomski @philvarner this is 95% adding function comments. thanks.

[jonhealy1]

@gadomski haha definitely understandable. thanks!