Move files and folders to new repo format to enable multi-project format

Zennysoft.Game.Ma/src/game/GameData.cs

@@ -0,0 +1,17 @@
+using Chickensoft.Introspection;
+using Chickensoft.Serialization;
+
+namespace Zennysoft.Game.Ma;
+
+[Meta, Id("game_data")]
+public partial record GameData
+{
+  [Save("player_data")]
+  public required PlayerData PlayerData { get; init; }
+
+  [Save("map_data")]
+  public required MapData MapData { get; init; }
+
+  [Save("rescued_items")]
+  public required RescuedItemDatabase RescuedItems { get; init; }
+}