Add door emag visuals and sound (#6971)

Co-authored-by: fishfish458 <fishfish458>

Content.Shared/Doors/Systems/SharedDoorSystem.cs

@@ -135,6 +135,11 @@ public abstract class SharedDoorSystem : EntitySystem
                 door.NextStateChange = GameTiming.CurTime + door.DenyDuration;
                 break;
 
+            case DoorState.Emagging:
+                _activeDoors.Add(door);
+                door.NextStateChange = GameTiming.CurTime + door.EmagDuration;
+                break;
+
             case DoorState.Open:
             case DoorState.Closed:
                 door.Partial = false;
@@ -352,7 +357,7 @@ public abstract class SharedDoorSystem : EntitySystem
         SetCollidable(uid, true, door, physics);
         door.NextStateChange = GameTiming.CurTime + door.CloseTimeTwo;
         _activeDoors.Add(door);
-        
+
         // Crush any entities. Note that we don't check airlock safety here. This should have been checked before
         // the door closed.
         Crush(uid, door, physics);
@@ -579,6 +584,10 @@ public abstract class SharedDoorSystem : EntitySystem
                 SetState(door.Owner, DoorState.Closed, door);
                 break;
 
+            case DoorState.Emagging:
+                StartOpening(door.Owner, door);
+                break;
+
             case DoorState.Open:
                 // This door is open, and queued for an auto-close.
                 if (!TryClose(door.Owner, door, predicted: true))