Add linter and syntax formatter

[helrond]

Add automated linting and syntax formatting. There are patterns for this in other RAC-developed apps:

• autopep8
• flake8
• isort
• implemented as a git pre-commit hook

[a-berish]

Example in RAC apps:
nebula/.pre-commit-config.yaml

Pre-commit hooks are tests that run each time you attempt to commit. If the tests pass, the commit will be made, otherwise not.
Pre-commit hooks