feat: Port Data.Set.Image (#949)

mathlib3 SHA: f178c0e25af359f6cbc72a96a243efd3b12423a3

- [x] depends on: #892

Co-authored-by: ChrisHughes24 <chrishughes24@gmail.com>
Co-authored-by: Chris Hughes <33847686+ChrisHughes24@users.noreply.github.com>
Co-authored-by: Winston Yin <winstonyin@gmail.com>

Mathlib.lean

@@ -180,6 +180,7 @@ import Mathlib.Data.Rat.Defs
 import Mathlib.Data.Rat.Init
 import Mathlib.Data.Rat.Order
 import Mathlib.Data.Set.Basic
+import Mathlib.Data.Set.Image
 import Mathlib.Data.Sigma.Basic
 import Mathlib.Data.Sigma.Lex
 import Mathlib.Data.Sigma.Order