[DOC] - Add notes for using JupyterHub Extension for Visual Studio Code

[viniciusdc]

Preliminary Checks

• This issue is not a question, feature request, RFC, or anything other than a bug report. Please post those things in GitHub Discussions: https://github.com/nebari-dev/nebari/discussions

Summary

Add instructions to users on how to install the extension and use it with your local vscode to sync work and develop against a running jupyterlab instance on nebari https://marketplace.visualstudio.com/items?itemName=ms-toolsai.jupyter-hub

Steps to Resolve this Issue

1. Explore the extension and document finding and usage (instructions should be the same as on their link, extra information related to nebari might be included, though)

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