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.Storage/Entities/Surface/DeviceEntity.cs

@@ -4,9 +4,7 @@ namespace Artemis.Storage.Entities.Surface
 {
     public class DeviceEntity
     {
-        public Guid Id { get; set; }
-
-        public int DeviceHashCode { get; set; }
+        public string DeviceIdentifier { get; set; }
         public double X { get; set; }
         public double Y { get; set; }
         public double Rotation { get; set; }