Class decorator: auto-properties

Implement @dataclassish — a class decorator that, for every attribute annotated in the class body (use __annotations__), synthesizes: - an __init__ accepting exactly those fields as keyword-or-positional args in declaration order, assigning each - a __repr__ as Name(field=repr, ...) in declaration order - an __eq__ comparing type and all field values (False for other types) The class may define its own __init__ — in that case LEAVE it alone and only add repr/eq if missing.

Difficulty: advanced