Sure.
Go to your global.js page, edit it, and add:
importArticles({
type: 'script',
articles: [
'u:dev:MediaWiki:OasisRevived.js',
]
});
Then, go to your global.css page, edit it, and add:
@import "/load.php?mode=articles&articles=u:dev:MediaWiki:OasisRevived.css&only=styles";
Then finally, although not necessary, just clear the cache of your browser to view the changes immediately.