Hints for forwords in main

Hints

• asv-cid-maybe-not-rdns
  forwords.metainfo.xml:4 - easy.learn.forwords
  The component ID might not follow the reverse domain-name schema (the TLD used by it is not known to the validator).
• asv-content-rating-missing
  forwords.metainfo.xml -
  This component has no `content_rating` tag to provide age rating information. You can generate the tag data online by answering a few questions at https://hughsie.github.io/oars/
• asv-developer-info-missing
  forwords.metainfo.xml -
  This component contains no `developer` element with information about its author.