feat(group_theory/submonoid/operations): `add_equiv.of_left_inverse` to match `linear_equiv.of_left_inverse` (#8279)
feat(group_theory/submonoid/operations): `add_equiv.of_left_inverse` to match `linear_equiv.of_left_inverse` (#8279)






leanprover-community/mathlib,leanprover-community/mathlib