Bug 1887740 - Add syntax highlighting for kotlin files in phabricator

Author: gabrielluong

src/infrastructure/markup/syntax/highlighter/PhutilPygmentsSyntaxHighlighter.php

@@ -133,6 +133,8 @@ private function getPygmentsLexerNameFromLanguageName($language) {
       'jbst' => 'duel',
       'kid' => 'genshi',
       'ksh' => 'bash',
+      'kt' => 'kotlin',
+      'kts' => 'kotlin',
       'less' => 'css',
       'lgt' => 'logtalk',
       'lisp' => 'common-lisp',