-----Description----- 
This test implements a function in Lean 4 that finds the maximum sum of any contiguous subarray within a list of integers. A subarray is a continuous section of the original array. If all integers in the list are negative, the function should return 0 (representing the empty subarray).

-----Input-----
numbers: A list of integers that may contain positive, negative, or zero values.

-----Output-----
An integer representing the maximum sum of any contiguous subarray. If the list is empty or contains only negative numbers, the function returns 0.

