Perform some code base cleanup

[mcdonnnj]

💡 Summary

Just some small, general cleanup on the code base including:

• Run isort against the code base to constructively organized imports.
• Re-run black to ensure that the code base is still formatted in the preferred manner.
• Remove unnecessary iPython breakpoints per https://github.com/cisagov/cyhy-core/pull/78#discussion_r1262848644.

Motivation and context

Improving code quality is always good and due to the nature of this code base (Python 2) we can not trivially automate these auto-formatters.

Implementation notes

An appropriate .isort.cfg file will need to be added and the isort and black tools should run without changing any files.