feat: Update Unity demo to use structured data for Flutter communication

This commit enhances the Unity demo by replacing anonymous object literals with structured data classes for messages sent to Flutter. The `ResetData` and `ReadyData` classes are introduced to improve clarity and maintainability of the data being communicated. This change ensures a more robust interaction between Unity and Flutter, aligning with best practices for data handling.

Author: juicycleff

templates/unity/Scripts/GameFrameworkDemo.cs

@@ -349,7 +349,7 @@ private void Reset(string data)
             }
 
             // Notify Flutter
-            SendToFlutter("onReset", new { success = true });
+            SendToFlutter("onReset", new ResetData { success = true });
 
             Log("Demo reset");
         }
@@ -393,11 +393,13 @@ private void GetState(string data)
 
         private void NotifyFlutterReady()
         {
-            SendToFlutter("onReady", new
+            SendToFlutter("onReady", new ReadyData
             {
                 success = true,
                 initialSpeed = _rotationSpeed,
-                initialAxis = new { x = _rotationAxis.x, y = _rotationAxis.y, z = _rotationAxis.z },
+                initialAxisX = _rotationAxis.x,
+                initialAxisY = _rotationAxis.y,
+                initialAxisZ = _rotationAxis.z,
                 message = "Unity cube demo ready!"
             });
 
@@ -471,6 +473,23 @@ public class CubeState
             public int messageCount;
         }
 
+        [Serializable]
+        public class ResetData
+        {
+            public bool success;
+        }
+
+        [Serializable]
+        public class ReadyData
+        {
+            public bool success;
+            public float initialSpeed;
+            public float initialAxisX;
+            public float initialAxisY;
+            public float initialAxisZ;
+            public string message;
+        }
+
         #endregion
     }
 }