Converts the list returned by [get_repos] into a tidy data frame. Each row represents one repository and includes its name, visibility, archive status, issue count, URL, and creation timestamp.
Value
A data frame with the following columns: * `repo_name`: the name of the repository, * `is_private`: whether the repository is private, * `archived`: whether the repository is archived, * `open_issues_count`: the number of open issues, * `repo_url`: the URL of the repository on GitHub, * `created_at`: the timestamp when the repository was created.