Add event publishing for inventory and combat interactions

GameCore/Events/HitscanImpactEvent.cs

@@ -0,0 +1,13 @@
+using GameCore.ECS;
+using GameCore.Events.Interfaces;
+using GameCore.Math;
+
+namespace GameCore.Events;
+
+public readonly struct HitscanImpactEvent(Entity owner, Vector3 from, Vector3 to, HitResult hit) : IEvent
+{
+    public readonly Entity Owner = owner;
+    public readonly Vector3 From = from;
+    public readonly Vector3 To = to;
+    public readonly HitResult Hit = hit;
+}