place netsim in static library

netsim/include/Device.hpp

@@ -0,0 +1,20 @@
+#pragma once
+
+#include <cstdint>
+#include <string>
+#include <memory>
+
+class Device {
+public:
+    friend std::ostream& operator<<(std::ostream& os, const Device& device);
+
+public:
+    Device(const std::string& macAddress);
+    static std::shared_ptr<Device> create(const std::string& macAddress);
+
+private:
+    void parseAndSetMac(const std::string& macAddress);
+
+private:
+    uint8_t macAddress[6];
+};