Add Pipfile and Pre-commit hook

[zacchaeuschok]

This PR adds Pipfile and Pipfile.lock for Python dependency management. I also added a pre-commit hook to ensure robust formatting of all incoming pull requests

How to use Pipenv

1. Install pipenv on your local
2. Run the following to activate your virtual environment

pipenv install
pipenv shell

How to use Pre-commit hook

1. Install pre-commit hook with pre-commit install
2. Add your changes i.e. git add .
3. Commit as per usual i.e. git commit -m "<message>"
4. Pre-commit hook will detect changes and format accordingly
5. Repeat step 2 to 3
6. Push your changes i.e. git push