Closes #3217: Add anchor link plugin for CKEditor5.

[joeparsons]

Description

Adds CKEditor5 anchor link module (and plugin).

Related issues

Closes #3217

How to test

• Add anchor links to a text area using the AZ Standard editor
• Save the content
• See if the editor stripped out the anchor links

Types of changes

Possible release notes.

Users with the content editor role can now easily create anchor links in text areas using the Standard text formatter.

Arizona Quickstart (install profile, custom modules, custom theme)

• Patch release changes
  • Bug fix
  • Accessibility, performance, or security improvement
  • Critical institutional link or brand change
  • Adding experimental module
  • Update experimental module
• Minor release changes
  • New feature
  • Breaking or visual change to existing behavior
  • Upgrade experimental module to stable
  • Enable existing module by default or database update
  • Non-critical brand change
  • New internal API or API improvement with backwards compatibility
  • Risky or disruptive cleanup to comply with coding standards
  • High-risk or disruptive change (requires upgrade path, risks regression, etc.)
• Other or unknown
  • Other or unknown

Drupal core

• Patch release changes
  • Security update
  • Patch level release (non-security bug-fix release)
  • Patch removal that's no longer necessary
• Minor release changes
  • Major or minor level update
• Other or unknown
  • Other or unknown

Drupal contrib projects

• Patch release changes
  • Security update
  • Patch or minor level update
  • Add new module
  • Patch removal that's no longer necessary
• Minor release changes
  • Major level update
• Other or unknown
  • Other or unknown

Checklist

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[natebyerley]

I tested this on Page, News and Event. Works.

I created a Block with an anchor link in it, and then embedded block in an Event. Anchor link worked as expected.

Approved.

[danahertzberg]

Requested improvements

• Maybe an interim solution could be added to CKEditor?
• Look into changing icon for this in the CKEditor
• Look into changing styles for text with anchor links

[joeparsons]

FWIW it looks like the plugin was available in Quickstart 1 but not enabled by default:

Also worth nothing that the plugin that was available in Quickstart 1 used the flag icon.