mediawiki: Enable a subset of default extensions

Full list of default extensions in MediaWiki
https://www.mediawiki.org/wiki/Bundled_extensions_and_skins

This initial set of extensions are chosen from:
- extensions that I've used myself over the past 3 years
- testing done in #1267

Extensions that are advanced features for administrators, meant for spam
control, advanced tags or suitable only to a specific kind of user are
not included.

Fixes #1382

More extensions can be enabled in the future if they're generally useful.

Signed-off-by: Joseph Nuthalapati <njoseph@riseup.net>
Reviewed-by: Sunil Mohan Adapa <sunil@medhas.org>

plinth/modules/mediawiki/data/etc/mediawiki/FreedomBoxStaticSettings.php

@@ -44,3 +44,11 @@ $wgDefaultSkin = "timeless";
 
 # Domain Name
 $wgServer = "https://freedombox.local";
+
+# Enable default extensions
+wfLoadExtension( 'Cite' );
+wfLoadExtension( 'Interwiki' );
+wfLoadExtension( 'MultimediaViewer' );
+wfLoadExtension( 'Renameuser' );
+wfLoadExtension( 'VisualEditor' );
+wfLoadExtension( 'WikiEditor' );