Notify user to install yarn editor sdk when detected using yarn as npm package manager

[FOWind]

If using yarn as npm package manager, we should install yarn editor sdk to enable powerful features , I think vscode can notify user to install them like go extension.

https://yarnpkg.com/getting-started/editor-sdks

Below is Go notification:

[bhavyaus]

@isidorn I'm not sure if you're the correct owner for this but could you please help direct this extension recommendation issue? Thank you.

[isidorn]

This is a fair feature request, however we do not have it on our immediate plan. Thus assigning to backlog for now to gather more feedback. Thanks

[vs-code-engineering]

We closed this issue because we don't plan to address it in the foreseeable future. If you disagree and feel that this issue is crucial: we are happy to listen and to reconsider.

If you wonder what we are up to, please see our roadmap and issue reporting guidelines.

Thanks for your understanding, and happy coding!