Update for Drupal 11 [#3469012]

Problem/Motivation

In order to use this theme to generate Drupal 11 screenshots for the User Guide (which uses this theme as part of the documentation) the theme needs to be updated to work with Drupal 11.

Proposed resolution

It looks like an update to the .info.yml file might is the only requirement to get this working with Drupal 11.

We can also remove the color module integration code as it's just sitting there not doing anything now. https://www.drupal.org/node/3276601

Issue fork honey-3469012

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3469012-update-for-drupal changes, plain diff MR !4
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