Make PKA require wielding (#16638)

Content.Shared/Wieldable/ItemWieldedEvent.cs

@@ -0,0 +1,7 @@
+namespace Content.Shared.Wieldable;
+
+/// <summary>
+/// Raised directed on an entity when it is wielded.
+/// </summary>
+[ByRefEvent]
+public readonly record struct ItemWieldedEvent;