refactor: refactor sound csv loading code

src/ObjCommon/Csv/CsvHeaderRow.h

@@ -0,0 +1,22 @@
+#pragma once
+
+#include "Csv/CsvStream.h"
+
+#include <optional>
+#include <string>
+#include <vector>
+
+class CsvHeaderRow
+{
+public:
+    CsvHeaderRow();
+
+    bool Read(const CsvInputStream& inputStream);
+
+    const std::string& HeaderNameForColumn(unsigned columnIndex) const;
+    bool RequireIndexForHeader(const std::string& headerName, unsigned& out) const;
+    [[nodiscard]] std::optional<unsigned> GetIndexForHeader(const std::string& headerName) const;
+
+private:
+    std::vector<std::string> m_header_row;
+};