File metadata via statx with ergonomic accessors. Uses the Exception effect for error handling.

Example

{ metadata } :: import "std/fs/metadata";

main :: (fn(io : Io, exn : Exception) -> unit)({
  m := io.await(metadata(Path.new(`/tmp/test.txt`), io), { io, exn });
  printf("size: %lld\n", m.size());
  printf("is file: %d\n", i32(m.is_file()));
});