Hi Astin
You can use the cross-platform dotnet cli and the new command to create a project outside of Visual Studio. The project templates will create more than just the .csproj file though, the web template is probably your best bet. We are planning to support the new .NET 6 .esproj format soon, which should be more suitable for this but this should work ok in the meantime.
An alternative option would be to place folder 4 insider one of the other folders (whichever is more relevant) and then the scanner should pick it up.
Tom