add text and pictures to easy help mainpage

public/img/help-more-settings.jpg

public/img/help-settings-cite.jpg

public/img/help-settings-search-filter.jpg

resources/lang/de/help/easy-language/help-mainpages.php

resources/less/metager/pages/help-easy-language.less

resources/views/help/easy-language/help-mainpages.blade.php