Alg123d has been integrated int Build123d !!!
Further develoipment will only happen on build123d.
Some of the shortcuts do not exist, for example:
shapelist.min(axis) -> shapelist.sort_by(axis).first
shapelist.max(axis) -> shapelist.sort_by(axis).last
faces(filter) -> faces().filter_by(filter)
But the main algebra logic remains the same