Hand pickup and drop triggers (#39663)

Content.Shared/Trigger/Components/Triggers/TriggerOnGotEquippedHandComponent.cs

@@ -0,0 +1,10 @@
+using Robust.Shared.GameStates;
+
+namespace Content.Shared.Trigger.Components.Triggers;
+
+/// <summary>
+/// Triggers an item when it is equipped into a hand slot.
+/// The user is the entity that picked the item up.
+/// </summary>
+[RegisterComponent, NetworkedComponent, AutoGenerateComponentState]
+public sealed partial class TriggerOnGotEquippedHandComponent : BaseTriggerOnXComponent;