feat(composition): added composition module stub

src/composition/private/composition.h

@@ -0,0 +1,36 @@
+#ifndef COMPOSITION_H
+#define COMPOSITION_H
+
+#include <iomanip>
+#include <iostream>
+#include <string>
+#include <unordered_map>
+#include <vector>
+
+#include "quill/LogMacros.h
+
+#include "probe.h"
+#include "config.h"
+
+struct CompositionEntry {
+    std::string symbol;
+    std::string mass_fraction;
+
+    friend std::ostream& operator<<(std::ostream& os, const CompositionEntry& entry) {
+        os << std::setw(5) << "<" << entry.symbol << " : " << entry.mass_fraction << ">";
+        return os;
+    }
+};
+
+class Composition {
+private:
+    Config& m_config = Config::getInstance();
+    Probe::LogManager& m_logManager = Probe::LogManager::getInstance();
+    quill::Logger* m_logger = logManager.getLogger('log');
+
+    std::vector<std::string> m_registeredSymbols;
+    std::unordered_map<std::string, CompositionEntry> m_compositions;
+
+}
+
+#endif // COMPOSITION_H