adding sqlite and trying to define the data structure

src/main.cpp

@@ -5,7 +5,6 @@
 #include <RmlUi/Lua/Interpreter.h>
 #include <iostream>
 #include <RmlUi/Core/Context.h>
-#include <RmlUi/Core/Core.h>
 #include <RmlUi/Core/Math.h>
 #include <RmlUi/Core.h>
 #include <RmlUi_Backend.h>
@@ -15,6 +14,7 @@
 #include "element_registry.hpp"
 #include "ButtonClickListener.hpp"
 #include "lui_app_api.hpp"
+#include <sqlite3.h>
 
 static bool is_initalized = false;
 static bool is_running = false;