Execute project dependency command from output directory for Desktop.

Created a new command resolver called OutputPathCommandResolver which
reolves a command from the project build output directory.

Made changes ProjectDependenciesCommandFactory to use
OutputPathCommandResolver if the target framework is Desktop.

Fixes - #2126

Still need to add tests.

TestAssets/TestPackages/dotnet-desktop-and-portable/Program.cs

@@ -11,6 +11,7 @@ namespace ConsoleApplication
 #elif NETSTANDARD1_5
             Console.WriteLine($"Hello {string.Join(" ", args)} From .NETStandardApp,Version=v1.5");
 #endif
+            Console.WriteLine($"Base Directory - {AppContext.BaseDirectory}");
         }
     }
 }