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/Network/NetworkLauncher.cs

@@ -0,0 +1,45 @@
+using UnityEngine;
+using Unity.Netcode;
+
+namespace Colosseum.Network
+{
+    /// <summary>
+    /// 네트워크 연결 관리 (Host/Client 시작)
+    /// </summary>
+    public class NetworkLauncher : MonoBehaviour
+    {
+        [Header("UI References")]
+        [SerializeField] private GameObject connectionUI;
+
+        private void Start()
+        {
+            // 게임 시작 시 UI 표시
+            if (connectionUI != null)
+                connectionUI.SetActive(true);
+        }
+
+        public void StartHost()
+        {
+            NetworkManager.Singleton.StartHost();
+            HideConnectionUI();
+        }
+
+        public void StartClient()
+        {
+            NetworkManager.Singleton.StartClient();
+            HideConnectionUI();
+        }
+
+        public void StartServer()
+        {
+            NetworkManager.Singleton.StartServer();
+            HideConnectionUI();
+        }
+
+        private void HideConnectionUI()
+        {
+            if (connectionUI != null)
+                connectionUI.SetActive(false);
+        }
+    }
+}

Assets/_Game/Scripts/Network/NetworkLauncher.cs.meta

@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: a94a6fa23cedaf545aea2b1057800149

Assets/_Game/Scripts/Network/PlayerSpawnPoint.cs

@@ -0,0 +1,56 @@
+using UnityEngine;
+
+namespace Colosseum.Network
+{
+    /// <summary>
+    /// 플레이어 스폰 위치 마커
+    /// 씬에 배치하여 플레이어가 스폰될 위치를 지정
+    /// </summary>
+    public class PlayerSpawnPoint : MonoBehaviour
+    {
+        [Header("Spawn Settings")]
+        [SerializeField] private bool useRotation = true;
+
+        private static System.Collections.Generic.List<PlayerSpawnPoint> spawnPoints = new System.Collections.Generic.List<PlayerSpawnPoint>();
+
+        private void Awake()
+        {
+            spawnPoints.Add(this);
+        }
+
+        private void OnDestroy()
+        {
+            spawnPoints.Remove(this);
+        }
+
+        /// <summary>
+        /// 사용 가능한 스폰 포인트 중 하나를 반환
+        /// </summary>
+        public static Transform GetRandomSpawnPoint()
+        {
+            if (spawnPoints.Count == 0)
+                return null;
+
+            int index = Random.Range(0, spawnPoints.Count);
+            return spawnPoints[index].transform;
+        }
+
+        /// <summary>
+        /// 스폰 포인트 개수 반환
+        /// </summary>
+        public static int SpawnPointCount => spawnPoints.Count;
+
+        private void OnDrawGizmos()
+        {
+            Gizmos.color = Color.green;
+            Gizmos.DrawWireSphere(transform.position, 0.5f);
+            Gizmos.color = Color.blue;
+            Gizmos.DrawLine(transform.position, transform.position + transform.forward * 1.5f);
+
+            // 화살표 머리
+            Vector3 arrowPos = transform.position + transform.forward * 1.5f;
+            Gizmos.DrawLine(arrowPos, arrowPos - transform.forward * 0.3f + transform.right * 0.2f);
+            Gizmos.DrawLine(arrowPos, arrowPos - transform.forward * 0.3f - transform.right * 0.2f);
+        }
+    }
+}

Assets/_Game/Scripts/Network/PlayerSpawnPoint.cs.meta

@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: aba9a2eb2571da14d901ed51c8866f47