add remote page loading

src/node_metadata.h

@@ -0,0 +1,12 @@
+#pragma once
+#include "node.h"
+
+class NodeMetadata : public Node
+{
+public:
+    std::map<std::string, std::string> m_props;
+    NodeMetadata() noexcept;
+    virtual Node* clone_instantiate() const override;
+    virtual void clone_copy(Node* dest) const override;
+    virtual void parse_attributes(kAttribute ka, const tinyxml2::XMLAttribute* attr) override;
+};