Support and documentation for GitHub Enterprise

I've not been able to find much documentation on [this page](https://docs.github.com/en/repositories/working-with-files/using-files/navigating-code-on-github) or in this repository about the state of GitHub Enterprise support.

If it is supported, what is needed to enable it? If it is not supported, can we get support for it?

从链接的 GitHub 文档页面开始，并检查此 repository 中是否已有对 GitHub Enterprise 的引用。确认是否支持 Enterprise；如果支持，确定是什么启用了它；记录已确认的状态和设置指南，或说明还缺少哪些支持工作。

由索引模型根据 Issue 内容生成。