String to Integer (atoi)

Parse text into a signed 32-bit integer. Skip leading ASCII spaces only (' '), read at most one optional '+' or '-', then consume consecutive ASCII digits '0'..'9'. Stop at the first other character. If no digits were consumed, return 0. Clamp to [-2147483648,2147483647]. Do not treat tabs, Unicode digits, decimal points or internal spaces as digits. At most 200 characters. Examples (JSON; null means Python None): Input: {"text": " -42 words"} Output: -42 Input: {"text": "91283472332"} Output: 2147483647

def parse_integer(text: str) -> int:
    """Parse an ASCII integer prefix and clamp its signed value."""
    pass