title: Angular 2+ localization (i18n) rtl support
body: <p>What is the best practice for adding right to left (rtl) support into a localized Angular 2+ app (e.g. for Hebrew and Arabic languages)? I looked through several tutorials including <a href="https://angular.io/guide/i18n" rel="noreferrer">Internationalization (i18n)</a> but none seem to be covering that. I would expect, for example, the html direction property (e.g. <code>&lt;html dir="rtl"&gt;</code>) to be added along with translations defined in 18n attributes at the build step of the app.</p>