Add MANIFEST

MANIFEST

+etc/callback_before_localization.diff
+html/Callbacks/LocalDateHeader/Ticket/Elements/ShowMessageHeaders/BeforeLocalization
+inc/Module/Install.pm
+inc/Module/Install/Base.pm
+inc/Module/Install/Can.pm
+inc/Module/Install/Fetch.pm
+inc/Module/Install/Makefile.pm
+inc/Module/Install/Metadata.pm
+inc/Module/Install/ReadmeFromPod.pm
+inc/Module/Install/RTx.pm
+inc/Module/Install/Win32.pm
+inc/Module/Install/WriteAll.pm
+lib/RT/Extension/LocalDateHeader.pm
+Makefile.PL
+MANIFEST			This list of files
+META.yml
+README