ci: add macOS build workflow (#114)

* ci: add macOS build workflow

* macos: add POSIX compatibility guards

* ci: select Xcode 26 for macOS

* macos: add kernel POSIX compatibility

* launcher: support macOS process startup

* ci: fix macOS architecture verification

* ci: cache glslang on Windows

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Co-authored-by: Abdullah K. <akjee204@gmail.com>

src/kernel/memory.cpp

@@ -40,6 +40,7 @@
 #endif
 #elif KYTY_PLATFORM == KYTY_PLATFORM_LINUX
 #include <cerrno>
+#include <fcntl.h>
 #include <sys/mman.h>
 #include <sys/syscall.h>
 #include <unistd.h>