typing docs: Make the PEPs list an expandable section, hidden by default (#105353)

Co-authored-by: Hugo van Kemenade <hugovk@users.noreply.github.com>

Doc/library/typing.rst

@@ -59,7 +59,12 @@ Relevant PEPs
 
 Since the initial introduction of type hints in :pep:`484` and :pep:`483`, a
 number of PEPs have modified and enhanced Python's framework for type
-annotations. These include:
+annotations:
+
+.. raw:: html
+
+   <details>
+   <summary><a style="cursor:pointer;">The full list of PEPs</a></summary>
 
 * :pep:`526`: Syntax for Variable Annotations
      *Introducing* syntax for annotating variables outside of function
@@ -106,6 +111,11 @@ annotations. These include:
 * :pep:`698`: Adding an override decorator to typing
     *Introducing* the :func:`@override<override>` decorator
 
+.. raw:: html
+
+   </details>
+   <br>
+
 .. _type-aliases:
 
 Type aliases