add rendering routines for devices

gui/include/NetworkRenderer.hpp

@@ -0,0 +1,17 @@
+#pragma once
+
+#include <vector>
+#include "Network.hpp"
+#include "DeviceRenderer.hpp"
+
+class NetworkRenderer {
+public:
+    NetworkRenderer(Network& network);
+
+    void AddDevice(std::shared_ptr<Device> device, uint16_t x, uint16_t y);
+    void Render(SDL_Renderer* renderer) const;
+
+private:
+    Network& network;
+    std::vector<DeviceRenderer> devices;
+};