Reverse String Python Solution with Tests

lcpy gen -n 344   # by problem number
lcpy gen -s reverse_string   # by problem name

Input: s = ["h","e","l","l","o"]
Output: ["o","l","l","e","h"]

Input: s = ["H","a","n","n","a","h"]
Output: ["h","a","n","n","a","H"]

class Solution:
    # Time: O(n)
    # Space: O(1)
    def reverse_string(self, s: list[str]) -> None:
        left = 0
        right = len(s) - 1
        while left < right:
            s[left], s[right] = s[right], s[left]
            left += 1
            right -= 1