- Add filter for directories and files in GithubRepositoryReader
- Ignore directories and files that do not pass the filter
- Print out if directory or file is ignored due to filter
- Add github_client argument to GithubRepositoryReader constructor
- Set default value for github_client argument
- Update docstring to reflect changes
* Moved github_client.py and utils.py from loader_hub/github_repo to modules/github_repo
* Updated import statements in base.py to reflect the new location