mathlib3

155f8e66 - feat(data/int/succ_pred): `ℤ` is succ- and pred- archimedean (#9731)

feat(data/int/succ_pred): `ℤ` is succ- and pred- archimedean (#9731) This provides the instances `succ_order ℤ`, `pred_order ℤ`, `is_succ_archimedean ℤ`, `is_pred_archimedean ℤ`.