This ends my series of patches fixing warnings throughout the codebase. Now, there are NO warnings except for unused parameters, tested on GCC 13.1.1 and Clang 16.0.2 with -Wall -Wextra.
Fixed dark mode crashing on Windows 8.1, 8 and 7, and removed a need for an export by moving in the function.
Any people looking at the Windows code and asking why I didn't use official version querying API's, those typically have some sort of unwanted behavior, plus checking exports to determine versions is shorter.
MSA Client ID has been moved to CMakeLists.txt, and defaults to the
Client ID for the PolyMC application.
Removed secrets/notsecrets library, replace with (temporary?)
program_info subdirectory.
