Add support for profiling

[DevAM-Tools]

I want to request support for profiling dotnet apps. For my daily work it is a very important feature that use frequently.

While having the choice between VS Code, Visual Studio and JetBrains Rider for my daily dotnet development work I go with VS Code most of the time. However if I need to profile my app I still need to switch to Visual Studio or JetBrains Rider because of their decent support for profiling that VS Code with C# DevKit simply does not provide.

[gregg-miskelly]

I am going to resolve this as a duplicate against microsoft/vscode-dotnettools#1287