Nominate Vassil Vassilev for Modules and Plugins (#114058)

Vassil has significant experience helping users with the plugin
interface in Clang, especially around the new efforts to bring plugin
support to Windows. He also is knowledgeable about modules support.

Author: AaronBallman

clang/Maintainers.rst

@@ -83,6 +83,9 @@ Modules & serialization
 | Michael Spencer
 | bigcheesegs\@gmail.com (email), Bigcheese (Phabricator), Bigcheese (GitHub)
 
+| Vassil Vassilev
+| Vassil.Vassilev\@cern.ch (email), v.g.vassilev (Phabricator), vgvassilev (GitHub)
+
 
 Templates
 ~~~~~~~~~
@@ -190,6 +193,12 @@ Attributes
 | ekeane\@nvidia.com (email), ErichKeane (Phabricator), erichkeane (GitHub)
 
 
+Plugins
+~~~~~~~
+| Vassil Vassilev
+| Vassil.Vassilev\@cern.ch (email), v.g.vassilev (Phabricator), vgvassilev (GitHub)
+
+
 Inline assembly
 ~~~~~~~~~~~~~~~
 | Eric Christopher