Setting C_Cpp.intelliSenseEngine to "disabled" doesn't work for a workspace folder

[sean-mcmanus]

It only works at the workspace level. If it can't work at the workspace folder level it should have its scope changed in the package.json.

[geertj]

It would be nice if instead this setting could be made to work at the folder level. Right now, this setting only works at the workspace level, but the workspace config is not added to source control and therefore requires a manual setup each time a new workspace is created.

The use case here is to disable IntelliSense for projects that use vscode-clangd.