GUI: add custom title format to settings dialog

rpcs3/Emu/title.h

@@ -0,0 +1,17 @@
+#pragma once
+
+#include <string>
+
+namespace rpcs3
+{
+	struct title_format_data
+	{
+		std::string format;
+		std::string title;
+		std::string title_id;
+		std::string renderer;
+		double fps = .0;
+	};
+	
+	std::string get_formatted_title(const title_format_data& title_data);
+}