gh-140870: Add PyREPL's module attributes import completion feature to What's New 3.15 (#156782)

Co-authored-by: Stan Ulbrych <stan@python.org>

Author: loic-simon

Doc/whatsnew/3.15.rst

@@ -902,6 +902,13 @@ Default interactive shell
   <using-on-controlling-color>`.
   (Contributed by Antonio Cuni and Pablo Galindo in :gh:`130472`.)
 
+* Tab completion now suggests module attributes in ``from ... import`` statements.
+  Attributes can only be suggested once the module is imported, so
+  :term:`stdlib` modules are imported automatically, while for
+  other modules the completer offers to import them when :kbd:`Tab`
+  is pressed a second time.
+  (Contributed by Loïc Simon and Pablo Galindo in :gh:`140870`.)
+
 
 New modules
 ===========