'Keyword Workbench' - for storing and utilising focus keywords

Problem/Motivation

Search engines use focus keywords to match pages based on searched terms.

Sidekick can generate focus keywords based on the page content, to give the best chance of having your content discovered.

The Keyword Workbench would be a new tab on the Sidekick settings page which provides a list of all text fields in the project, which you can use to store/save generated focus keywords.

If the field is present on a node/add or node/edit page, a 'generate focus keywords' button will be added, that will generate the keywords and update that field input.

We would like to integrate with the yoast_seo module (motivated by the Drupal Starshot/CMS intiative, who will also use yoast_seo), allowing users to target the yoast keywords field.

There is also the opportunity to integrate with the metatags module, though that requires a little investigation at this point.