Use EaF-Linter for Code Linting

## Idea
Our code is looking great, but we should start using GitHub actions and EaF linter for our code formatting, testing, and linting. The repository for [EaF linter is here](https://github.com/fairfield-programming/eaf-linter/).

## Todo
- [ ] Switch to using EaF Linter for the code listing in GitHub actions 