Fix build pc version on macOS

[Vyacguru]

This pull request addresses the issue of building the PC version on macOS. These operating system do not have a native implementation of C11 Threads, which makes the build process impossible.

To resolve this, I have integrated the project c11threads, which provides the necessary mechanisms for C11 Threads to function on these OS.

By including this project, we can ensure that the build process is successful on macOS. For Windows we need also add c file with windows threading realization. But it doesnt works, sfml in mingw so old, and can't run after build. Simply way to run pc version on Windows - recreate project on cmake