[Meta] Audit each module to be included into Drupal CMS for accessibility issues

Problem/Motivation

Each of the modules to be included into Drupal CMS should be assessed for accessibility issues

Proposed resolution

• Run audits on modules and themes included in Drupal CMS to ensure that as many issues as possible are identified and documented
• A future Accessibility Conformance Report for Core and Contrib could utilize that data.

Remaining tasks

The current state of audits can be found here:

1. Modules included in Drupal CMS
2. Olivero/Oliver for Drupal CMS
3. Gin

The current overall list of issues tagged with Drupal CMS a11y on the issue queue on drupal.org.

Approach for modules:

• Check the list of modules (column A) and their audit state (column G) in the Google Sheet
• Decide if you want to add an audit to a module that none so far or if you want to expand an already existing one - add your username on drupal.org to column I.
• In case you are starting a new audit, create a meta issue on the issue queue of the module and link it to the parent #3475279: [Meta] Audit each module to be included into Drupal CMS for accessibility issues, create child issues and add them to the meta, and finally unassign yourself on the Google Sheet as well as adding the newly created meta and all the child issues there as well
• In case you want to expand and already existing audit, simply add new child issues to the module meta issue, add those child issues to the Google sheet as well, and unassign yourself on the Google Sheet in the end.

Approach for themes:

• In case of Gin, simply create child issues and add them to #3506302: [Meta] Improve the accessibility of the Gin theme as well as the Google Sheet for Gin
• In case of Olivero for Drupal CMS, there does not exist a meta issue yet, for the time being only add the issues you've created to the Google Sheet for Olivero