Need a way to resolve duplicate outline information provided by multiple extensions

[lextm]

This is part of the latest wave of collaboration among all major extension authors.

You can see both vscode-rst and esbonio provides section navigation and this sometimes makes it difficult to understand.

One thing to notice is that both implementations have their values,

• Esbonio's feature does not work if the open folder does not contain a sphinx project.
• Esbonio's feature is part of the language server while the feature from this extension is implemented differently.

I am not sure what might be the ultimate solution, but a quick workaround might be adding options to disable section navigation feature in this extension. For example, I only work on sphinx projects so esbonio's section navigation is enough for me.