Split Page interface into own file

Change-Id: Ib2e23f63e47a3da19e30f4a8d61372ee0f26851d

autoload.php

@@ -934,7 +934,7 @@ $wgAutoloadLocalClasses = [
 	'PackedHoverImageGallery' => __DIR__ . '/includes/gallery/PackedOverlayImageGallery.php',
 	'PackedImageGallery' => __DIR__ . '/includes/gallery/PackedImageGallery.php',
 	'PackedOverlayImageGallery' => __DIR__ . '/includes/gallery/PackedOverlayImageGallery.php',
-	'Page' => __DIR__ . '/includes/page/WikiPage.php',
+	'Page' => __DIR__ . '/includes/page/Page.php',
 	'PageArchive' => __DIR__ . '/includes/specials/SpecialUndelete.php',
 	'PageExists' => __DIR__ . '/maintenance/pageExists.php',
 	'PageLangLogFormatter' => __DIR__ . '/includes/logging/PageLangLogFormatter.php',

includes/page/Page.php

@@ -0,0 +1,25 @@
+<?php
+/**
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ */
+
+/**
+ * Interface for type hinting (accepts WikiPage, Article, ImagePage, CategoryPage)
+ */
+interface Page {
+}

includes/page/WikiPage.php

@@ -20,12 +20,6 @@
  * @file
  */
 
-/**
- * Interface for type hinting (accepts WikiPage, Article, ImagePage, CategoryPage)
- */
-interface Page {
-}
-
 /**
  * Class representing a MediaWiki article and history.
  *