Add prediction for standing states and mob states (#1937)

Content.Shared/GameObjects/Components/Rotation/SharedRotationComponent.cs

@@ -0,0 +1,25 @@
+using System;
+using Robust.Shared.Serialization;
+
+namespace Content.Shared.GameObjects.Components.Rotation
+{
+    [Serializable, NetSerializable]
+    public enum RotationVisuals
+    {
+        RotationState
+    }
+
+    [Serializable, NetSerializable]
+    public enum RotationState
+    {
+        /// <summary>
+        ///     Standing up
+        /// </summary>
+        Vertical,
+
+        /// <summary>
+        ///     Laying down
+        /// </summary>
+        Horizontal,
+    }
+}