Add initial draft of structured data def parser to parse enums only for now

src/ObjLoading/Parsing/StructuredDataDef/StructuredDataDefParserState.h

@@ -0,0 +1,20 @@
+#pragma once
+#include <memory>
+#include <vector>
+
+#include "Domain/CommonStructuredDataDef.h"
+
+namespace sdd
+{
+    class StructuredDataDefParserState
+    {
+    public:
+        std::vector<std::unique_ptr<CommonStructuredDataDef>> m_defs;
+
+        CommonStructuredDataDef* m_current_def;
+        CommonStructuredDataDefEnum* m_current_enum;
+        CommonStructuredDataDefStruct* m_current_struct;
+
+        StructuredDataDefParserState();
+    };
+}