Re-introduce prototype code

src/items/ArmorItem.cs

@@ -0,0 +1,8 @@
+using Godot;
+
+[GlobalClass]
+public partial class ArmorItem : InventoryItem
+{
+  [Export]
+  public required int Defense { get; set; }
+}

src/items/InventoryItem.cs

@@ -0,0 +1,11 @@
+using Godot;
+
+[GlobalClass]
+public partial class InventoryItem : Resource
+{
+  [Export]
+  public string Name = string.Empty;
+
+  [Export]
+  public string Description = string.Empty;
+}

src/items/WeaponItem.cs

@@ -0,0 +1,10 @@
+using Godot;
+
+[GlobalClass]
+public partial class WeaponItem : InventoryItem
+{
+  [Export]
+  public required int Damage { get; set; }
+
+  public static WeaponItem Default => new WeaponItem() { Damage = 1 };
+}