Add Header Lexer for ZCG cpp

src/ZoneCodeGeneratorLib/Parsing/Commands/CommandsFileReader.h

@@ -3,6 +3,7 @@
 #include <string>
 
 #include "ZoneCodeGeneratorArguments.h"
+#include "Parsing/IParserLineStream.h"
 #include "Persistence/IDataRepository.h"
 
 class CommandsFileReader
@@ -13,6 +14,12 @@ class CommandsFileReader
     const ZoneCodeGeneratorArguments* m_args;
     std::string m_filename;
 
+    std::vector<std::unique_ptr<IParserLineStream>> m_open_streams;
+    IParserLineStream* m_stream;
+
+    bool OpenBaseStream();
+    void SetupStreamProxies();
+
 public:
     explicit CommandsFileReader(const ZoneCodeGeneratorArguments* args, std::string filename);