Add microwave visualizer. Clean up microwave code.

Content.Shared/Kitchen/SharedMicrowave.cs

@@ -0,0 +1,18 @@
+using Robust.Shared.Serialization;
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace Content.Shared.Kitchen
+{
+
+     [Serializable, NetSerializable]
+     public enum MicrowaveVisualState
+     {
+         Off,
+         PoweredIdle,
+         Cooking
+     }
+
+    
+}