Create a function that takes an array of strings representing times ('hours:minutes:seconds') and returns their sum as an array of integers ([hours, minutes, seconds]).
timeSum(["1:23:45"]) ➞ [1, 23, 45]
timeSum(["1:03:45", "1:23:05"]) ➞ [2, 26, 50]
timeSum(["5:39:42", "10:02:08", "8:26:33"]) ➞ [24, 8, 23]
If the input is an empty array, return [0, 0, 0].