[U] add PlayFab SDK and SNS login improvements

- Add PlayFabSDK as local package dependency
- Add PlayFabTool.cs for PlayFab API integration
- Implement LoginBySns method in TYSdkFacade
- Add Android SNS login support in SDKManager and UnityBridgeFunc
- Add Build Android With Debug menu option
- Improve exception handling and timeout management

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

sdk-intergration/LocalPackages/PlayFabSDK/Shared/Internal/SingletonMonoBehaviour.cs

@@ -0,0 +1,58 @@
+using UnityEngine;
+
+namespace PlayFab.Internal
+{
+    //public to be accessible by Unity engine
+    public class SingletonMonoBehaviour<T> : MonoBehaviour where T : SingletonMonoBehaviour<T>
+    {
+        private static T _instance;
+
+        public static T instance
+        {
+            get
+            {
+                CreateInstance();
+                return _instance;
+            }
+        }
+
+        public static void CreateInstance()
+        {
+            if (_instance == null)
+            {
+                //find existing instance
+                _instance = FindObjectOfType<T>();
+                if (_instance == null)
+                {
+                    //create new instance
+                    var go = new GameObject(typeof(T).Name);
+                    _instance = go.AddComponent<T>();
+                }
+                //initialize instance if necessary
+                if (!_instance.initialized)
+                {
+                    _instance.Initialize();
+                    _instance.initialized = true;
+                }
+            }
+        }
+
+        public virtual void Awake ()
+        {
+            if (Application.isPlaying)
+            {
+                DontDestroyOnLoad(this);
+            }
+
+            //check if instance already exists when reloading original scene
+            if (_instance != null)
+            {
+                DestroyImmediate (gameObject);
+            }
+        }
+
+        protected bool initialized;
+
+        protected virtual void Initialize() { }
+    }
+}