Type checking nested navigator is missing StackParamList definition and usage

In the Nesting Navigators guide, the example given does not work with the stack structure provided in the page (which is not nested to begin with). I believe the author is implying a different nested stack (since the example is using StackParamList instead of RootStackParamList), but the definition for the StackParamList is not provided, confusing the reader into thinking it's the same as the RootStackParamList.

The definition of StackParamList and its usage should provided to give context to the nested examples.

打开 versioned_docs/version-6.x/typescript.md，并结合页面上展示的 stack 结构阅读 Nesting Navigators 部分。添加缺失的 StackParamList 定义及其用法，使嵌套示例与周围的示例保持一致，并且无需猜测即可理解。