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.Core/Models/Surface/ArtemisDevice.cs

@@ -91,7 +91,7 @@ namespace Artemis.Core.Models.Surface
         internal void ApplyToEntity()
         {
             // Other properties are computed
-            DeviceEntity.DeviceHashCode = RgbDevice.GetDeviceHashCode();
+            DeviceEntity.DeviceIdentifier = RgbDevice.GetDeviceIdentifier();
         }
 
         internal void ApplyToRgbDevice()