feat: add extensible item inventory and world system

src/Features/Items/Domain/PassiveItemInstance.cs

@@ -0,0 +1,13 @@
+using Game.Features.Items.Contracts;
+
+namespace Game.Features.Items.Domain;
+
+public sealed class PassiveItemInstance(ItemInfo info) : IItemInstance
+{
+    public ItemInfo Info { get; } = info;
+
+    public ItemActionResult Use(ItemUseRequest request) => ItemActionResult.Fail(
+        ItemActionStatus.UnsupportedAction,
+        $"Item {Info.DefinitionId} cannot be used directly."
+    );
+}