[mmo] rss feed for yandex.turbo pages

The add-on allows you to send RSS feed for Yandex.Turbo technology As a source of Turbo pages, you need to use a link of the form: yourdomain/yturbo-feed.xml At the moment, the minimum version of php is 7.0. In future releases and additions, I will be using php 7.3/7.4. 7.0-7.2 are outdated...