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/Components/GameObject.cpp

@@ -187,5 +187,48 @@ void GameObject::Destroy() {
     }
 }
 
+void GameObject::Serialize(std::ostream& os) const {
+    os << "name=" << m_name << ";";
+    os << "active=" << (m_activeSelf ? "1" : "0") << ";";
+    os << "id=" << m_id << ";";
+    os << "transform=";
+    m_transform->Serialize(os);
+    os << ";";
+}
+
+void GameObject::Deserialize(std::istream& is) {
+    std::string token;
+    
+    while (is.peek() != -1 && is.peek() != '\n' && is.peek() != '\r') {
+        if (is.peek() == ';') {
+            is.get();
+            if (is.peek() == ';') break;
+            continue;
+        }
+        
+        char key[64];
+        is.get(key, 64, '=');
+        if (key[0] == '\0') break;
+        is.get();
+        
+        if (strcmp(key, "name") == 0) {
+            std::getline(is, m_name, ';');
+        } else if (strcmp(key, "active") == 0) {
+            char val;
+            is.get(val);
+            m_activeSelf = (val == '1');
+            if (is.peek() == ';') is.get();
+        } else if (strcmp(key, "id") == 0) {
+            is >> m_id;
+            if (is.peek() == ';') is.get();
+        } else if (strcmp(key, "transform") == 0) {
+            m_transform->Deserialize(is);
+            if (is.peek() == ';') is.get();
+        } else {
+            std::getline(is, token, ';');
+        }
+    }
+}
+
 } // namespace Components
 } // namespace XCEngine