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/_Game/Scripts/Stats/CharacterStats.cs

@@ -0,0 +1,60 @@
+using UnityEngine;
+
+namespace Colosseum.Stats
+{
+    /// <summary>
+    /// 캐릭터 스탯 관리 컴포넌트.
+    /// 6개 기본 스탯과 파생 스탯을 관리.
+    /// </summary>
+    public class CharacterStats : MonoBehaviour
+    {
+        [Header("기본 스탯")]
+        [SerializeField] private CharacterStat strength = new CharacterStat(10f);
+        [SerializeField] private CharacterStat dexterity = new CharacterStat(10f);
+        [SerializeField] private CharacterStat intelligence = new CharacterStat(10f);
+        [SerializeField] private CharacterStat vitality = new CharacterStat(10f);
+        [SerializeField] private CharacterStat wisdom = new CharacterStat(10f);
+        [SerializeField] private CharacterStat spirit = new CharacterStat(10f);
+
+        // 기본 스탯 접근자
+        public CharacterStat Strength => strength;
+        public CharacterStat Dexterity => dexterity;
+        public CharacterStat Intelligence => intelligence;
+        public CharacterStat Vitality => vitality;
+        public CharacterStat Wisdom => wisdom;
+        public CharacterStat Spirit => spirit;
+
+        // 파생 스탯 프로퍼티
+        // 최대 체력 = VIT * 10
+        public float MaxHealth => vitality.FinalValue * 10f;
+
+        // 최대 마나 = SPI * 5
+        public float MaxMana => spirit.FinalValue * 5f;
+
+        // 물리 대미지 = STR * 2
+        public float PhysicalDamage => strength.FinalValue * 2f;
+
+        // 마법 대미지 = INT * 2
+        public float MagicDamage => intelligence.FinalValue * 2f;
+
+        // 회복력 = WIS * 1.5
+        public float HealPower => wisdom.FinalValue * 1.5f;
+
+        /// <summary>
+        /// 스탯 타입으로 CharacterStat 가져오기
+        /// </summary>
+        public CharacterStat GetStat(StatType statType)
+        {
+            return statType switch
+            {
+                StatType.Strength => strength,
+                StatType.Dexterity => dexterity,
+                StatType.Intelligence => intelligence,
+                StatType.Vitality => vitality,
+                StatType.Wisdom => wisdom,
+                StatType.Spirit => spirit,
+                _ => null,
+            };
+        }
+    }
+}