Low-level nqp operations

nqp::say('hello');

nqp::push(@array, $value);
$value := nqp::pop(@array);

$value := nqp::add_i(3, 2);

my @array := nqp::list($val0, $val1, $val2, ...);
my @hash  := nqp::hash($key0, $val0, $key1, $val1, ...);