cmp_tool

This commit introduces a pre-commit configuration file
(.pre-commit-config.yaml) to ensure code quality and consistency by
automatically running various checks and fixes before commits are
finalized.

Quick start
===========
1. Install pre-commit
Before you can run hooks, you need to have the pre-commit package
manager installed.
Using pip:
pip install pre-commit

2. Install the git hook scripts
run:
pre-commit install
to set up the git hook scripts

Now pre-commit will run automatically on git commit!

3. (optional) Run against all the files
It's usually a good idea to run the hooks against all of the files when
adding new hooks (usually pre-commit will only run on the changed files
during git hooks):
pre-commit run --all-files

For more information see https://pre-commit.com