Add Black to GitHub Actions Workflow

[crippledgeek]

Add Black to GitHub Actions Workflow

This PR adds the Black code formatter to our GitHub Actions workflow. Here are the key changes:

1. Install Black:
   In the "Install dependencies" step, we've added black to the list of packages installed:

   python -m pip install flake8 pytest black

2. New Black Formatting Step:
   We've added a new step to run Black after linting with flake8 and before running tests:

   - name: Format with Black
     run: |
       black --check --diff .

   This step runs Black in check mode (--check) and shows the diff of any formatting changes (--diff).
   The workflow will fail if there are any formatting issues, but it won't actually change the files.

Notes

• If we want Black to automatically format the files instead of just checking, we can remove the --check and --diff flags.
• Consider adding a .black configuration file to the repository to customize Black's behavior if needed.
• We might want to adjust our flake8 configuration to align with Black's formatting choices, particularly the line length.