[MOOSE-384] FE: Accordion Block Schema

[GeoffDusome]

What does this do/fix?

This pull request introduces support for generating FAQPage structured data (schema.org) for the core/accordion block when a new "Enable FAQ Schema" toggle is enabled. The main changes add both the backend filter to generate the JSON-LD schema and the editor control for users to opt in.

FAQ Schema Support for Accordion Block:

• Added a new Accordion_Filter class that appends FAQPage structured data to the core/accordion block if the "Enable FAQ Schema" toggle is enabled. The filter parses the block's HTML to extract question and answer pairs and outputs the appropriate JSON-LD.
• Registered the new Accordion_Filter in the block filters definition so it is applied when rendering blocks. [1] [2]

Block Editor Enhancements:

• Added a new toggle control in the core/accordion block editor (editor.js) allowing users to enable or disable FAQ schema generation for each accordion instance.

QA

Links to relevant issues

• Link to Issue

Screenshots/video:

• Editor view: https://p.tri.be/i/hlmgbC
• FE view: https://p.tri.be/i/bY8GYI

Pull request checklist

• I've added a changelog entry for these changes.
• I've linked to a relevant Jira issue.
• I've captured a screenshot or screencast of the changes and linked it above.

[dpellenwood]

🍏 Nice use fo the Core HTML parser!