Damage visualizer for simple mobs (#1332)

Co-authored-by: Metal Gear Sloth <metalgearsloth@gmail.com>
Co-authored-by: Pieter-Jan Briers <pieterjan.briers+git@gmail.com>

Content.Shared/GameObjects/Components/Mobs/SharedDamageState.cs

@@ -0,0 +1,19 @@
+using System;
+using Robust.Shared.Serialization;
+
+namespace Content.Shared.GameObjects.Components.Mobs
+{
+    [Serializable, NetSerializable]
+    public enum DamageStateVisuals
+    {
+        State
+    }
+    
+    [Serializable, NetSerializable]
+    public enum DamageStateVisualData
+    {
+        Normal,
+        Crit,
+        Dead
+    }
+}