Add NOGDI define for building on Windows

[BlueAmulet]

In order to get Barony to build correctly, I've had to add the NOGDI define to prevent conflicts between wingdi.h and rapidjson
wingdi.h would #define GetObject to GetObjectA/GetObjectW, which would break using rapidjson in light.cpp

Also added WIN32_LEAN_AND_MEAN, none of the additional includes were necessary.

Minor note: Installing all the dependencies through vcpkg, besides theoraplayer and fmod, the SDL2 includes were in their own folder and I had to change all the #include "SDL2.h" and related defines to #include <SDL2/SDL2.h>