PEP 788: Reimagining native threads (#4385)

Co-authored-by: Adam Turner <9087854+AA-Turner@users.noreply.github.com>
Co-authored-by: Victor Stinner <vstinner@python.org>
Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com>

Author: 4 people

.github/CODEOWNERS

@@ -666,6 +666,7 @@ peps/pep-0784.rst  @gpshead
 peps/pep-0785.rst  @gpshead
 # ...
 peps/pep-0787.rst  @ncoghlan
+peps/pep-0788.rst  @ZeroIntensity @vstinner
 # ...
 peps/pep-0789.rst  @njsmith
 # ...