Add pre-commit hooks for linting

[gsheni]

• This makes it so that linting is automatically run right before you commit code:
• We use this https://pre-commit.com/
• Example of this:
  

[gsheni]

@sbadithe Can checkout this branch and make sure the steps in contributing.md work for you? They are as follows:

pip install pre-commit
pre-commit install
pre-commit run

[sbadithe]

@sbadithe Can checkout this branch and make sure the steps in contributing.md work for you? They are as follows:

pip install pre-commit
pre-commit install
pre-commit run

Commands run for me, but it skips all the checks as it says there are no files to check

[gsheni]

@sbadithe Yes, it will only run on the changed files

[thehomebrewnerd]

Do we need to list the pip install pre-commit and pre-commit install commands or will that be covered when users run make installdeps?

I created a fresh environment and just ran make installdeps and it seems like everything worked.

[thehomebrewnerd]

Hmm...upon further review, you might actually have to run pre-commit install before the hooks actually run on a commit on a fresh clone of the repo.

Maybe we also need to add pre-commit install to the make installdeps command?

[gsheni]

Fixed:
de40da2

[thehomebrewnerd]

LGTM