[FEATURE] Sql4Cds for Visual Studio Code

[fowl2]

Since Azure Data Studio is being retired, it would be great if we could use the extension is VS code instead.

First barrier is installation, which is fixed with a quick update the package.json, but as far as I can tell the "new connection" dialog doesn't exist and therefore the rest of the extension can't be activated.

Any pointers?

[MarkMpn]

This would involve re-implementing a lot of the UI that is currently included in Azure Data Studio - the connection dialog, object explorer, results grid, execution plan view etc.

I don't currently have time to start this project, but if someone would like to pick this up I'd be happy to support where I can.