feat(group_theory/monoid_localization): some homs induced on localizations: lift, map (#2118)
* should I be changing and committing toml idk
* initial monoid loc lemmas
* responding to PR comments
* removing bad @[simp]
* inhabited instances
* remove #lint
* additive inhabited instance
* using is_unit & is_add_unit
* doc string
* remove simp
* submonoid.monoid_loc... -> submonoid.localization
* submonoid.monoid_loc... -> submonoid.localization
* generalize inhabited instance
* remove inhabited instance
* 2nd section
* docs and linting
* removing questionable `@[simp]s`
* removing away
* adding lemmas, removing 'include'
* removing import
* responding to PR comments
* use eq_of_eq to prove comp_eq_of_eq
* name change
* trying to update mathlib
* make lemma names consistent
* Update src/algebra/group/is_unit.lean
* Update src/algebra/group/is_unit.lean
* fix build
* documentation and minor changes
* spacing
* fix build
* applying comments
Co-authored-by: Chris Hughes <33847686+ChrisHughes24@users.noreply.github.com>
Co-authored-by: Chris Hughes <chrishughes24@gmail.com>
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>