[ticket/13508] Add include_css() and fix include_js() code linting issues

PHPBB3-13508

phpBB/phpbb/template/twig/tokenparser/include_css.php

@@ -0,0 +1,27 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\template\twig\tokenparser;
+
+class include_css extends includecss
+{
+	/**
+	* Gets the tag name associated with this token parser.
+	*
+	* @return string The tag name
+	*/
+	public function getTag(): string
+	{
+		return 'include_css';
+	}
+}