Move Common functionality to Core project & rendering and Model support as well

PckStudio.Core/Interfaces/IEditor.cs

@@ -0,0 +1,24 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using OMI.Formats.Pck;
+
+namespace PckStudio.Interfaces
+{
+    public interface IEditor<T> where T : class
+    {
+        T EditorValue { get; }
+
+        ISaveContext<T> SaveContext { get; }
+
+        void Save();
+
+        void SaveAs();
+
+        void Close();
+
+        void UpdateView();
+    }
+}