input: Write a function to find the sum of all elements in a list using recursion.
  assert list_sum_recursive([1, 2, 3, 4, 5]) == 15
  assert list_sum_recursive([10, 20, 30, 40, 50]) == 150
  assert list_sum_recursive([0, -1, -2, -3, -4, -5]) == -15
output: def list_sum_recursive(lst):
      if not lst:
          return 0
      return lst[0] + list_sum_recursive(lst[1:])