The About section should include a link to Documentation for Try F#

1. In particular, I'm looking for information about how Try F# persists changes.

From experiment, it appears to have persisted some of my changes, but not others.

2. Also, what is the purpose of the GitHub token input and how do I use it?

3. In case I accidentally delete stuff, maybe there could be a reset button to restore the original content.

4. Maybe the last link in the F# Basics section should be a blank page for experimentation (with just something like module Prototyping; open System; printfn "Hello, world!").

首先检查 About 部分以及 issue 中提到的 F# Basics 链接。确定当前如何解释持久化和 GitHub token，然后记录这些行为，并明确 reset 和 prototyping-page 请求是否属于这项工作。完成的标准是：所要求的文档链接和使用细节清晰明确，额外的 UI 想法已确定范围或单独跟踪。

由索引模型根据 Issue 内容生成。