[Userscript] Wanikani Katakana For Onyomi

New year, new version.

Note that this script now depends on Installing Wanikani Open Framework
Because I hear that javascript developers love including frameworks, and I can at least pretend to try to be professional. (It does actually solve a real problem as well).

The script should now display on’yomi correctly during lessons, although the dropdown during lesson reviews is still wip.