Add basic parsing for menu lists with only loadMenus instructions

src/ObjLoading/Parsing/Menu/MenuFileReader.h

@@ -0,0 +1,28 @@
+#pragma once
+
+#include <memory>
+#include <string>
+#include <vector>
+
+#include "Domain/MenuFeatureLevel.h"
+#include "Parsing/IParserLineStream.h"
+
+class MenuFileReader
+{
+public:
+    using include_callback_t = std::function<std::unique_ptr<std::istream>(const std::string& filename)>;
+    
+private:
+    std::string m_file_name;
+    IParserLineStream* m_stream;
+    std::vector<std::unique_ptr<IParserLineStream>> m_open_streams;
+
+    bool OpenBaseStream(std::istream& stream, include_callback_t includeCallback);
+    void SetupStreamProxies();
+
+public:
+    MenuFileReader(std::istream& stream, std::string fileName);
+    MenuFileReader(std::istream& stream, std::string fileName, include_callback_t includeCallback);
+
+    bool ReadMenuFile(MenuFeatureLevel featureLevel);
+};