filesystem: add mac os x directory watcher this code is incredibly stinky tbh we should probably be using C++ threads everywhere else just because they are SO much easier to code for than the shitty Qt threads API

#include "fmt/format.h"

int main(int argc, char** argv) {
  for (int i = 0; i < argc; ++i) fmt::print("{}: {}\n", i, argv[i]);
}