Deprecate GitHub-API

I'd like to open up the discussion around deprecating this package. GitHub itself maintains a great JavaScript client library in [Octokit](https://github.com/octokit/rest.js). I think due to the popularity of our library, it almost hurts the community since we're splitting efforts across multiple projects.

I propose we come up with a rough timeline to deprecating this package and formally recommending people move to Octokit. We could still take security fixes or certain bug fixes for a period of time.

Start by reviewing the issue discussion and the linked Octokit project to understand the proposed migration. Done would require agreement on a deprecation timeline, the period for security or bug fixes, and how this package will formally direct users to Octokit.

Do mô hình lập chỉ mục viết ra từ nội dung của issue.