Mirror speed penalty for worn duffels and hardsuits when in-hand (#22168)

* Add speed penalty for holding hardsuits and duffels

* just inherit from ClothingSpeedModifier

* comment godo

Content.Shared/Hands/EntitySystems/SharedHandsSystem.Relay.cs

@@ -0,0 +1,21 @@
+using Content.Shared.Hands.Components;
+using Content.Shared.Movement.Systems;
+
+namespace Content.Shared.Hands.EntitySystems;
+
+public abstract partial class SharedHandsSystem
+{
+    private void InitializeRelay()
+    {
+        SubscribeLocalEvent<HandsComponent, RefreshMovementSpeedModifiersEvent>(RelayEvent);
+    }
+
+    private void RelayEvent<T>(Entity<HandsComponent> entity, ref T args) where T : EntityEventArgs
+    {
+        var ev = new HeldRelayedEvent<T>(args);
+        foreach (var held in EnumerateHeld(entity, entity.Comp))
+        {
+            RaiseLocalEvent(held, ref ev);
+        }
+    }
+}

Content.Shared/Hands/EntitySystems/SharedHandsSystem.cs

@@ -31,6 +31,7 @@ public abstract partial class SharedHandsSystem
         InitializeDrop();
         InitializePickup();
         InitializeVirtual();
+        InitializeRelay();
     }
 
     public override void Shutdown()

Content.Shared/Hands/HandEvents.cs

@@ -319,4 +319,15 @@ namespace Content.Shared.Hands
 
         public EntityUid Sender { get; }
     }
+
+    [ByRefEvent]
+    public sealed class HeldRelayedEvent<TEvent> : EntityEventArgs
+    {
+        public TEvent Args;
+
+        public HeldRelayedEvent(TEvent args)
+        {
+            Args = args;
+        }
+    }
 }