screen concept

src/main_screen.cpp

@@ -0,0 +1,17 @@
+#include "./main_screen.hpp"
+
+#include <imgui/imgui.h>
+
+#include <memory>
+
+MainScreen::MainScreen(std::string save_path) {
+}
+
+Screen* MainScreen::poll(bool& quit) {
+	bool open = !quit;
+	ImGui::ShowDemoWindow(&open);
+	quit = !open;
+
+	return nullptr;
+}
+