impr: Added support for returning results from scripts

plugins/script_loader/templates/CSharp/ImHexScript/Program.cs

@@ -3,14 +3,18 @@ using ImGuiNET;
 
 class Script : IScript {
     
-    public static void OnLoad()
+    public static int OnLoad()
     {
         // This function is executed the first time the Plugin is loaded
+
+        return 1;
     }
 
-    public static void Main()
+    public static int Main()
     {
         // This function is executed when the plugin is selected in the "Run Script..." menu
+
+        return 1;
     }
     
 }