Issues building with MinGW and Ninja on Windows

[mtwango]

The https://github.com/Sphereserver/Source-X/blob/master/src/common/sphere_library/sobjpool.h needs to #include <atomic> due to

Source-X/src/common/sphere_library/sobjpool.h:359:34: error: field 'm_fallbackObjsCount' has incomplete type 'std::atomic<unsigned int>'
  359 |     mutable std::atomic<index_t> m_fallbackObjsCount;

Another issue is in os_set_thread_name_portable in https://github.com/Sphereserver/Source-X/blob/master/src/sphere/threads.cpp

Source-X/src/sphere/threads.cpp:411:9: error: cast between incompatible function types from 'FARPROC' {aka 'long long int (*)()'} to 'SetThreadDescription_t' {aka 'long int (*)(void*, const wchar_t*)'} [-Werror=cast-function-type]
  411 |         reinterpret_cast<SetThreadDescription_t>(
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  412 |             GetProcAddress(GetModuleHandleW(L"Kernel32.dll"), "SetThreadDescription"));
      |             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

[mtwango]

There seems to be more issues with this. I was able to fix the issue with casting it via void*:

    static SetThreadDescription_t pSetThreadDescription =
        reinterpret_cast<SetThreadDescription_t>(
            reinterpret_cast<void*>(
                GetProcAddress(GetModuleHandleW(L"Kernel32.dll"), "SetThreadDescription")));

And it builds. But when launching it, it needs 3 mingw64 libraries to be copied to the folder with exe file.

If I manually copy the files from mingw64, it still wont start due to some issue with finding __cxa_thread_atexit in dynamically linked library SphereSvrX64_nighty.exe

The debug build is like 300 megabytes big, nightly around 10.