create manual test script for vscode extension

[RodgeFu]

Clear and concise description of the problem

create manual test script for vscode extension. You can find the basic scenario we are working on in the spec below. thx
https://microsoft.sharepoint.com/:w:/t/AzureDeveloperExperience/EXfInUWxaOpNpXVtcQOAt4cBoVwvu3tZe3Od__r9vdc8qQ?e=9UVP8c

Checklist

• Follow our Code of Conduct
• Read the docs.
• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.

[msyyc]

#5552