Meta: Add my email(s) to .mailmap

Also map the author name I used before to my current proper name.

.mailmap

@@ -1,2 +1,3 @@
+Ali Mohammad Pur <mpfard@serenityos.org> <ali.mpfard@gmail.com>
 Brian Gianforcaro <bgianf@serenityos.org> <b.gianfo@gmail.com>
 <gbeutner@serenityos.org> <gunnar@beutner.name>