mathlib

c6b53304 - feat(set_theory/ordinal/fixed_point): add missing theorem (#18323)

feat(set_theory/ordinal/fixed_point): add missing theorem (#18323) We add `apply_lt_nfp_bfamily` matching `apply_lt_nfp_family`, and rename the existing theorem with that name to `apply_lt_nfp_bfamily_iff`, matching `apply_lt_nfp_family_iff`.