Provide hook for using this library with pre-commit

[dhruvkb]

pre-commit is a popular framework for running Git hooks before commits or pushes. To make a library work with pre-commit, it must provide hooks.

This will make it easier to use this library as a part of most developers' local setups and CI, especially with #8.

Reference

• https://github.com/pre-commit/mirrors-eslint
• Documentation for creating new hooks