input: Write a function to detect if an item is in a list.
  assert detect_item([1, 2, 3, 4, 5], 3) == True
  assert detect_item([1, 2, 3, 4, 5], 6) == False
  assert detect_item(['apple', 'banana', 'cherry'], 'banana') == True
  assert detect_item(['apple', 'banana', 'cherry'], 'grape') == False
output: def detect_item(lst, item):
      return item in lst