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