move out everything out of main into a separate file

include/app.hpp

@@ -0,0 +1,28 @@
+#ifndef APP_HPP
+#define APP_HPP
+
+#include <cpu.hpp>
+#include <gpu.hpp>
+#include <mutex>
+#include <sys.hpp>
+
+namespace app {
+
+struct sensors {
+    sys::TimeDate td;
+    double avg[3] = {0.0f};
+    sys::Memory ram;
+    sys::Disk home;
+    sys::Network net;
+    sys::sysSensors sys;
+    cpu::cpuSensors cpu;
+    gpu::gpuSensors gpu;
+    float hass_state = 0.0f;
+    std::mutex mtx;  // making sure the struct isnt accessed by multiple threads at once
+};
+
+void start(void);
+
+}  // namespace app
+
+#endif