feat(library/hott) change axioms to Leo's axioms-as-typeclass proposal
chore(library/hott) adapted theories to typeclass axioms
fix(library/hott) fill both gaps (I don't know why it works that way), change name from funext.apply to funext.ap, since apply seems to be a tactic name?
chore(library/hott) adjust funext_from_ua.lea to typeclass axioms
fix(library/hott) fix equiv_precomp, doesn't look nice now
chore(library/hott) make funext more general
feat(library/hott) funext from ua now with arbitrary universe levels for funext!
chore(library/hott) made ua_implies_funext a class instance
fix(frontends/lean/parser_config): binder(s) rbp was not being saved in .olean file