Add initial project files and configurations for Unity setup

Assets/Scripts/Core/Ports/IPersistenceService.cs

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+namespace Core.Ports
+{
+    public interface IPersistenceService
+    {
+        void Save(string key, int value);
+        int Load(string key, int defaultValue = 0);
+    }
+}

Assets/Scripts/Core/Ports/IPersistenceService.cs.meta

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+fileFormatVersion: 2
+guid: b21e8384f7154851a4b258200a5eaed8
+timeCreated: 1765568951

Assets/Scripts/Core/Ports/ITileView.cs

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+using Core.Domain;
+
+namespace Core.Ports
+{
+    public interface ITileView
+    {
+        string TileId { get; }
+        void Initialize(Tile tile);
+        void SetVisualState(TileState state);
+        void DropPhysics();
+        void Dispose();
+    }
+}

Assets/Scripts/Core/Ports/ITileView.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: a4d59fe7258e450a868cd36cd306c0da
+timeCreated: 1765560752