Refactored menu logic into MenuController interface, updated RT64

src/ui/ui_launcher.cpp

@@ -0,0 +1,31 @@
+#include "recomp_ui.h"
+#include "../../ultramodern/ultramodern.hpp"
+#include "RmlUi/Core.h"
+
+class LauncherMenu : public recomp::MenuController {
+public:
+    LauncherMenu() {
+
+    }
+	~LauncherMenu() override {
+
+	}
+	Rml::ElementDocument* load_document(Rml::Context* context) override {
+        return context->LoadDocument("assets/launcher.rml");
+	}
+	void register_events(recomp::UiEventListenerInstancer& listener) override {
+		recomp::register_event(listener, "start_game",
+			[](Rml::Event& event) {
+				ultramodern::start_game(0);
+				recomp::set_current_menu(recomp::Menu::Config);
+			}
+		);
+	}
+	void make_bindings(Rml::Context* context) override {
+
+	}
+};
+
+std::unique_ptr<recomp::MenuController> recomp::create_launcher_menu() {
+    return std::make_unique<LauncherMenu>();
+}