Save and load map data

src/player/PlayerData.cs

@@ -1,5 +1,6 @@
 using Chickensoft.Introspection;
 using Chickensoft.Serialization;
+using System.Collections.Generic;
 
 namespace GameJamDungeon;
 
@@ -12,3 +13,10 @@ public partial record PlayerData
   [Save("player_inventory")]
   public required Inventory Inventory { get; init; }
 }
+
+[Meta, Id("map_data")]
+public partial record MapData
+{
+  [Save("floor_list")]
+  public required List<string> FloorScenes { get; init; }
+}