JanDenondt/ModernOriginBase ? reverse-engineered prompt

Build me a clean mod menu base for Grand Theft Auto V in C++, something that can serve as a solid starting point for learning and experimenting.

I want a simple but polished menu that opens in game, lets me navigate options easily, and has a few basic example features like toggles, submenus, and placeholder actions so I can expand it later. Please keep the code organized and easy to read, and make sure it builds properly from the solution that is already here.

If anything needs current GTA V or C++ library details, look up the latest docs online and use whatever is most reliable. Keep it focused on the base structure, menu flow, and clean code, since this is for educational use and I want something that feels stable and easy to extend.