Implement code quality best practices

[eld120]

As a new team we would like to implement a set of code standards to maximize code quality in our effort to find/correct bugs and maximize code readability so that contributors can minimize stress and maximize productivity.

[eld120]

Fairly long winded but I'm adopting django-cookiecutter's code quality suggestions:

• mypy
• flake8
• coverage
• isort
• black
• pre-commit

The purpose of this change is to ensure that all commits adhere to PEP8 code formatting prior to submitting any git commit. It's also worthwhile to familiarize myself with all of these seemingly common packages before jumping into other projects that likely use some if not all of them.

Current status: get pre-commit to work for the first time