Nick/pre commit

[ntjohnson1]

Small ergonomics focused PR to resolve #280.

1. Adds pre-commit to dev deps. Makes it easier for instance to run pre-commit run --all-files if CI fails. Hooks are still opt-in
2. Some minor cleanup in our pytest infra. Moves the ini to pyproject.toml which has been supported for a few years. Also removes the indevelopment marker that we used internally for developing initial capability but hasn't been used since published to github.

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📚 Documentation preview 📚: https://pyttb--284.org.readthedocs.build/en/284/