Core port - Targeting .NET Core 3.1!

Core port - Updated projects to new project layout
Core port - Changed the way devices are identified to be consistent across different frameworks
Core port - Updated plugin system to no longer use AppDomain but AssemblyLoadContext (through McMaster.NETCore.Plugins)
Core port - Renamed a few events to keep Fody from getting confused

src/Artemis.UI/Behaviors/TreeViewSelectionBehavior.cs

@@ -1,7 +1,7 @@
 using System.Collections.Specialized;
 using System.Windows;
 using System.Windows.Controls;
-using System.Windows.Interactivity;
+using Microsoft.Xaml.Behaviors;
 
 namespace Artemis.UI.Behaviors
 {