This Visual Studio Code extension is intended to support ASharp.Net (A#), which is Ada 2005 for .Net, with some syntax highlighting. Note: I was unable to get A# tools working on Windows Server 2003 or ReactOS, so I could not try out an actual A# app to verify the extension. So the extension was tested on an AdaCore app. Note that there is also a proper Ada extension from AdaCore (<https://marketplace.visualstudio.com/items?itemName=AdaCore.ada>), and that one could be used if this extension does not satisfy.
Copy the 'pkg' folder as publishername.extensionname-versionnumber to %USERPROFILE%\.vscode\extensions (on Windows) or ~/.vscode/extensions (on Linux/ Mac) and restart VS Code,
download the .vsix file and choose 'Install from VSIX...' from the app.