Align Unity-style object and hierarchy scripting APIs

managed/XCEngine.ScriptCore/GameObject.cs

@@ -1,6 +1,6 @@
 namespace XCEngine
 {
-    public sealed class GameObject
+    public sealed class GameObject : Object
     {
         private readonly ulong m_uuid;
 
@@ -67,6 +67,16 @@ namespace XCEngine
             return InternalCalls.GameObject_GetComponent(UUID, typeof(T)) as T;
         }
 
+        public T GetComponentInChildren<T>() where T : Component
+        {
+            return InternalCalls.GameObject_GetComponentInChildren(UUID, typeof(T)) as T;
+        }
+
+        public T GetComponentInParent<T>() where T : Component
+        {
+            return InternalCalls.GameObject_GetComponentInParent(UUID, typeof(T)) as T;
+        }
+
         public T AddComponent<T>() where T : Component
         {
             return InternalCalls.GameObject_AddComponent(UUID, typeof(T)) as T;