Port request for Relation Module

[serrato-dan]

Name of the module, theme, or layout Relation

Link to the drupal.org module, theme, or layout https://www.drupal.org/project/relation

(Optional) Link to an issue in the drupal.org queue asking the Drupal community if anyone is working on a Backdrop port of this project I did not find any information in the issue queue, but that's probably because Drupal is moving to replace Relation with Group and Dynamic Entity Reference for D8 and forward.

(Optional) Bounty At this time, I don't have any idea if we could provide bounty funds