Implement inventory system with item management and pickup functionality

GameCore/Inventory/PickupComponent.cs

@@ -0,0 +1,10 @@
+using GameCore.ECS.Interfaces;
+
+namespace GameCore.Inventory;
+
+public class PickupComponent : IComponent
+{
+    public string ItemId { get; set; }
+    public int Quantity { get; set; } = 1;
+    public bool IsInstantUse { get; set; } = false;
+}