input: Write a python function to add two lists element-wise using Numpy.
  assert np_add_lists([1, 2, 3], [4, 5, 6]) == [5, 7, 9]
  assert np_add_lists([0, -1, -2], [1, 1, 1]) == [1, 0, -1]
  assert np_add_lists([10, 20, 30], [5, 15, 25]) == [15, 35, 55]
output: import numpy as np
  
  def np_add_lists(list1, list2):
      return (np.array(list1) + np.array(list2)).tolist()