Balanced Parentheses Validator

You need to validate if a given string of parentheses is balanced. A string is considered balanced if every opening bracket has a corresponding closing bracket and they are in the correct order. Your task is to implement the function `is_balanced(s: str) -> bool` that returns `True` if the string is balanced and `False` otherwise. Input: - A single string containing only the characters '(', ')', '{', '}', '[' and ']'. Output: - Return `True` or `False` based on the balance status of the input string. Example: Input: (({}[])) Output: True