make main window injectable + start settings window

src/settings_window.cpp

@@ -0,0 +1,35 @@
+#include "./settings_window.hpp"
+
+#include <imgui/imgui.h>
+#include <imgui/misc/cpp/imgui_stdlib.h>
+
+SettingsWindow::SettingsWindow(ConfigModelI& conf) : _conf(conf) {
+}
+
+void SettingsWindow::render(void) {
+	{ // main window menubar injection
+		// assumes the window "tomato" was rendered already by cg
+		if (ImGui::Begin("tomato")) {
+			if (ImGui::BeginMenuBar()) {
+				ImGui::Separator();
+				if (ImGui::BeginMenu("Settings")) {
+					if (ImGui::MenuItem("show settings window")) {
+						_show_window = true;
+					}
+					ImGui::EndMenu();
+				}
+				ImGui::EndMenuBar();
+			}
+
+		}
+		ImGui::End();
+	}
+
+	if (_show_window) {
+		if (ImGui::Begin("Settings", &_show_window)) {
+			ImGui::Text("Settings here sldjflsadfs");
+		}
+		ImGui::End();
+	}
+}
+