That's one way of doing it. There's a similar plugin that auto posts from RSS feeds: https://github.com/barisusakli/nodebb-plugin-rss
So perhaps you can change the code where it parses an RSS feed to reading the twitter feed instead. Or use an twitter to RSS service like https://twitrss.me/
If you wrote an IFTTT plugin though, that would be pretty cool 🙂