* Incorporate LUS CMake CVar system.
Customize all LUS CMake CVars to align with plans for preset system.
Swap "gOverlayFont" usage back to LUS CVar macro.
* Change CMake sets to use the cache to allow for including LUS's file for the add_compile_defines and remove the duplication on SoH's side.
* Move SoH CMake CVars to `soh-cvars.cmake` for clarity.
