Create a utility function in the Cite codebase which can convert an integer to the content language script. We want to clone https://doc.wikimedia.org/mediawiki-core/master/js/mw.language.html#.convertNumber but with some major differences:
- Use wgContentLang and not the user language.
- Don't include separators. Don't support anything after the decimal place.
- Only one direction, number to string.