Build `code_golf_charcount(code, ignore_whitespace)` — the scorer for code golf submissions: - `ignore_whitespace=False` → return `len(code)` (raw, including spaces and newlines). - `ignore_whitespace=True` → return count of non-whitespace characters only. - Empty string → `0` (in both modes). - A character is "whitespace" iff `ch.isspace()` is True (covers space, tab, newline, vertical tab, etc.). The two modes mirror two leagues: "true golf" (every byte counts) vs "logic golf" (formatting free).