place netsim in static library

netsim/include/Network.hpp

@@ -0,0 +1,21 @@
+#pragma once
+
+#include <vector>
+#include <memory>
+#include <string>
+
+#include "Device.hpp"
+
+class Network {
+public:
+    friend std::ostream& operator<<(std::ostream& os, const Network& network);
+
+public:
+    Network(const std::string& name);
+
+    void addDevice(std::shared_ptr<Device> device);
+
+private:
+    std::vector<std::shared_ptr<Device>> devices;
+    std::string name;
+};