Add project files.

ModVersionChecker/managers/interfaces/INotifyIconService.cs

@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ModVersionChecker.managers.interfaces
+{
+    public interface INotifyIconService
+    {
+        void SetNotifyIcon(NotifyIcon icon);
+        void ShowBalloonTip(int millis, string title, string message, ToolTipIcon icon);
+    }
+}