403 - API rate limit exceeded

Every command, we call GitHub api to fetch files and so on. However this can cause issues like API rate limit.
Ways to solve this:
- Require some credentials so have a bigger limit ( not even sure if this would work )
- Cache the files locally somehow, and create a update method which would run once a day or when forced.

Start by tracing the GitHub API calls made by each command and identify where rate-limit failures occur. Review the proposed credentials and local-cache approaches before choosing a direction; the work is done when repeated commands no longer exceed the API limit and the behavior is covered by tests.

Written by the indexing model from the issue text.