건설 시스템 기초 생성 및 Kaykit Medival 애셋 추가

Assets/Scripts/BuildingData.cs

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+using UnityEngine;
+
+namespace Northbound
+{
+    [CreateAssetMenu(fileName = "NewBuilding", menuName = "Northbound/Building Data")]
+    public class BuildingData : ScriptableObject
+    {
+        [Header("Building Info")]
+        public string buildingName;
+        public GameObject prefab;
+
+        [Header("Grid Size")]
+        [Tooltip("Width in grid units")]
+        public int width = 1;
+        [Tooltip("Length in grid units")]
+        public int length = 1;
+        [Tooltip("Height for placement validation")]
+        public float height = 2f;
+
+        [Header("Placement Settings")]
+        [Tooltip("Offset from grid position")]
+        public Vector3 placementOffset = Vector3.zero;
+        [Tooltip("Can rotate this building?")]
+        public bool allowRotation = true;
+
+        public Vector3 GetSize(int rotation)
+        {
+            // Rotation 0,180 = normal, 90,270 = swap width/length
+            bool isRotated = (rotation == 1 || rotation == 3);
+            float w = isRotated ? length : width;
+            float l = isRotated ? width : length;
+            return new Vector3(w, height, l);
+        }
+    }
+}