Fix inventory menu, add armor as equippable item

src/items/armor/Armor.cs

@@ -1,8 +1,26 @@
+using Chickensoft.AutoInject;
+using Chickensoft.Introspection;
 using GameJamDungeon;
 using Godot;
+using System.Linq;
 
+[Meta(typeof(IAutoNode))]
 public partial class Armor : InventoryItem
 {
+  public override void _Notification(int what) => this.Notify(what);
+
   [Export]
   public override InventoryItemInfo InventoryInfo { get; set; }
+
+  public void OnReady()
+  {
+    Pickup.BodyEntered += OnEntered;
+  }
+
+  public void OnEntered(Node3D body)
+  {
+    var inventoryList = GameRepo.InventoryItems.Value.Append(InventoryInfo).ToList();
+    GameRepo.InventoryItems.OnNext(inventoryList);
+    QueueFree();
+  }
 }