Add precommit hook

[nateinaction]

Following @TheSilentDefender's suggestion, this PR implements a precommit hook which runs the previously implemented linter black as well as a few additional white space checks. All code changes are whitespace only and should not impact compilation or runtime behavior.

The manual file modifications in this PR are:

• .pre-commit-config.yaml
• README.md
• requirements.txt

This is what is looks like when the precommit hook runs:

pre-commit run --all-files
Trim Trailing Whitespace.................................................Passed
Fix End of Files.........................................................Passed
Check Yaml...............................................................Passed
Check for added large files..............................................Passed
black....................................................................Passed

[blakejameson]

I ran the code on my machine, and it worked. Great job Nate