添加 Components 和 Scene 序列化支持

- Component: 添加 Serialize/Deserialize 虚函数
- TransformComponent: 实现 Transform 数据的序列化/反序列化
- GameObject: 实现对象序列化/反序列化
- Scene: 实现 Save/Load 方法，支持场景文件保存和加载
- 测试: 添加 Save_And_Load 和 Save_ContainsGameObjectData 测试

engine/src/Scene/Scene.cpp

@@ -1,5 +1,6 @@
 #include "Scene/Scene.h"
 #include "Components/GameObject.h"
+#include <sstream>
 
 namespace XCEngine {
 namespace Components {
@@ -141,11 +142,53 @@ void Scene::LateUpdate(float deltaTime) {
 }
 
 void Scene::Load(const std::string& filePath) {
+    std::ifstream file(filePath);
+    if (!file.is_open()) {
+        return;
+    }
+
     m_gameObjects.clear();
     m_rootGameObjects.clear();
+    m_gameObjectIDs.clear();
+
+    std::string line;
+    while (std::getline(file, line)) {
+        if (line.empty() || line[0] == '#') continue;
+        
+        std::istringstream iss(line);
+        std::string token;
+        std::getline(iss, token, '=');
+        
+        if (token == "scene") {
+            std::getline(iss, m_name, ';');
+        } else if (token == "gameobject") {
+            auto go = std::make_unique<GameObject>();
+            go->Deserialize(iss);
+            go->m_scene = this;
+            GameObject* ptr = go.get();
+            GameObject::GetGlobalRegistry()[ptr->m_id] = ptr;
+            m_gameObjectIDs.insert(ptr->m_id);
+            m_rootGameObjects.push_back(ptr->m_id);
+            m_gameObjects.emplace(ptr->m_id, std::move(go));
+        }
+    }
 }
 
 void Scene::Save(const std::string& filePath) {
+    std::ofstream file(filePath);
+    if (!file.is_open()) {
+        return;
+    }
+
+    file << "# XCEngine Scene File\n";
+    file << "scene=" << m_name << ";\n";
+    file << "active=" << (m_active ? "1" : "0") << ";\n\n";
+
+    for (auto* go : GetRootGameObjects()) {
+        file << "gameobject=";
+        go->Serialize(file);
+        file << "\n";
+    }
 }
 
 } // namespace Components