chore: Assets 디렉토리 구조 정리 및 네이밍 컨벤션 적용

- Assets/_Game/ 하위로 게임 에셋 통합
- External/ 패키지 벤더별 분류 (Synty, Animations, UI)
- 에셋 네이밍 컨벤션 확립 및 적용
  (Data_Skill_, Data_SkillEffect_, Prefab_, Anim_, Model_, BT_ 등)
- pre-commit hook으로 네이밍 컨벤션 자동 검사 추가
- RESTRUCTURE_CHECKLIST.md 작성

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Assets/External/UI/InterfaceFantasyWarriorHUD/Samples/Scripts/SampleSceneLoader.cs

@@ -0,0 +1,134 @@
+// Copyright (c) 2024 Synty Studios Limited. All rights reserved.
+//
+// Use of this software is subject to the terms and conditions of the End User Licence Agreement (EULA) 
+// of the store at which you purchased this asset. 
+//
+// Synty assets are available at:
+// https://www.syntystore.com
+// https://assetstore.unity.com/publishers/5217
+// https://www.fab.com/sellers/Synty%20Studios
+//
+// Sample scripts are included only as examples and are not intended as production-ready.
+
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Linq;
+using UnityEngine;
+using UnityEngine.SceneManagement;
+#if UNITY_EDITOR
+using System.IO;
+using UnityEditor;
+using UnityEditor.SceneManagement;
+#endif
+
+namespace Synty.Interface.FantasyWarriorHUD.Samples
+{
+    /// <summary>
+    ///     A simple scene loader that transitions between screens.
+    /// </summary>
+    public class SampleSceneLoader : MonoBehaviour
+    {
+        [Header("References")]
+        public Animator animator;
+
+        [Header("Parameters")]
+        public bool showCursor;
+
+        [SerializeField]
+        private List<string> _sceneNames;
+
+#if UNITY_EDITOR
+        private void RefreshScenes()
+        {
+            MonoScript script = MonoScript.FromMonoBehaviour(this);
+            string samplesPath = Path.GetDirectoryName(Path.GetDirectoryName(AssetDatabase.GetAssetPath(script)));
+            string[] searchPaths = { Path.Combine(samplesPath, "Scenes") };
+            _sceneNames = AssetDatabase.FindAssets($"t:scene", searchPaths)
+                .Select(guid => Path.GetFileNameWithoutExtension(AssetDatabase.GUIDToAssetPath(guid)))
+                .ToList();
+            EditorUtility.SetDirty(this);
+        }
+
+        private void OnValidate()
+        {
+            RefreshScenes();
+        }
+#endif
+
+        private void OnEnable()
+        {
+            if (animator)
+            {
+                animator.gameObject.SetActive(true);
+                animator.SetBool("Active", false);
+            }
+
+            if (showCursor)
+            {
+                Cursor.lockState = CursorLockMode.None;
+                Cursor.visible = true;
+            }
+        }
+
+        public void QuitApplication()
+        {
+#if UNITY_EDITOR
+            EditorApplication.isPlaying = false;
+#else
+            Application.Quit();
+#endif
+        }
+
+        public void NextScene()
+        {
+            string currentScene = SceneManager.GetActiveScene().name;
+            SwitchScene(_sceneNames[(_sceneNames.IndexOf(currentScene) + 1) % _sceneNames.Count]);
+        }
+
+        public void PreviousScene()
+        {
+            string currentScene = SceneManager.GetActiveScene().name;
+            SwitchScene(_sceneNames[(_sceneNames.IndexOf(currentScene) - 1 + _sceneNames.Count) % _sceneNames.Count]);
+        }
+
+        public void SwitchScene(string sceneName)
+        {
+#if UNITY_EDITOR
+            if (!EditorApplication.isPlaying)
+            {
+                return;
+            }
+#endif
+            StartCoroutine(C_SwitchScene(sceneName));
+        }
+
+        private IEnumerator C_SwitchScene(string sceneName)
+        {
+            if (animator)
+            {
+                animator.gameObject.SetActive(true);
+                animator.SetBool("Active", true);
+                yield return new WaitForSeconds(0.5f);
+            }
+
+#if UNITY_EDITOR
+            string path = sceneName;
+            if (path.IndexOf('/') == -1)
+            {
+                string guid = AssetDatabase.FindAssets($"{sceneName} t:scene")[0];
+                path = AssetDatabase.GUIDToAssetPath(guid);
+            }
+
+            yield return EditorSceneManager.LoadSceneAsyncInPlayMode(path, new LoadSceneParameters(LoadSceneMode.Single));
+#else
+            // make sure the scene is in the build settings for runtime version
+            AsyncOperation asyncLoad = SceneManager.LoadSceneAsync(sceneName);
+            while (!asyncLoad.isDone)
+            {
+                yield return null;
+            }
+#endif
+        }
+    }
+}