Fetch Issues Data

[tomasohCHOM]

Add functionality to oss-stats to fetch issues data from the acmcsufoss organization

To-Do

• Create a function called fetch_issues (look at fetch_repositories as a reference) inside oss_stats/github.py that will fetch the number of issues opened across all repositories in acmcsufoss
• Go into oss_stats/cli.py and add the "issues" option under the cli function

Contributing

1. git checkout main to position yourself in the main branch first
2. git pull for latest change if there's any
3. git checkout -b "add/issues" to create a new branch
4. Once you are done adding your code, commit those changes then push them via git push origin add/issues
5. Assign reviewer (@tomasohCHOM or @EvanCPSC or @JOwen-ster) before merging code