* Create Logger class and log instance * Replace yomichan.logWarning with log.warn * Replace yomichan.logError with log.error * Replace yomichan.log with log.log * Update the Yomichan class to use the global log object * Update lint rules
* Move cross frame API from API to Yomichan * Add API instance to Yomichan * Move api global to yomichan.api * Pass yomichan to API * Remove IIFE
* Refactor API preparation * Run yomichan.prepare manually in the entry point function
* Move bg/js/settings/ to js/settings/ * Move bg/js/settings2/ to js/settings/
