NPC wake / sleep cleanup (#5679)

Content.Shared/MobState/MobStateChangedEvent.cs

@@ -0,0 +1,27 @@
+using Content.Shared.MobState.Components;
+using Content.Shared.MobState.State;
+using Robust.Shared.GameObjects;
+
+namespace Content.Shared.MobState
+{
+    public class MobStateChangedEvent : EntityEventArgs
+    {
+        public MobStateChangedEvent(
+            MobStateComponent component,
+            IMobState? oldMobState,
+            IMobState currentMobState)
+        {
+            Component = component;
+            OldMobState = oldMobState;
+            CurrentMobState = currentMobState;
+        }
+
+        public IEntity Entity => Component.Owner;
+
+        public MobStateComponent Component { get; }
+
+        public IMobState? OldMobState { get; }
+
+        public IMobState CurrentMobState { get; }
+    }
+}