mathlib

e04892ec - feat(topology/metric_space/isometry): add_left/right, neg (#2234)

feat(topology/metric_space/isometry): add_left/right, neg (#2234) Also add some lemmas from `equiv` namespace to `isometric`. Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>