Adding automatically generated & pushed FAQ JSON-LD schema feature to accordion

[JonBarakMierke]

Summary

Adds a faq boolean attribute to <x-ui.accordion>.
When present, the component parses its rendered items and automatically builds a FAQPage JSON-LD schema, then pushes it onto Laravel's head stack via @Push('head').

Each accordion item's trigger text becomes a Question, and its content panel's markup becomes the corresponding Answer.
Items with an empty trigger or empty content are silently skipped rather than emitted as blank entries.

No new dependencies — extraction uses PHP's built-in DOMDocument/DOMXPath, consistent with the library's zero-dependency, copy-paste philosophy.
</ sequences in answer HTML are escaped to prevent breaking out of the <script> tag.

Usage

<x-ui.accordion faq>
    <x-ui.accordion.item trigger="What is your return policy?">
        <p>We offer a 30-day return policy for all unused items in their original packaging.</p>
    </x-ui.accordion.item>
    <x-ui.accordion.item trigger="How long does shipping take?">
        <p>Standard shipping typically takes 3-5 business days.</p>
    </x-ui.accordion.item>
</x-ui.accordion>

Consumers need @stack('head') declared in their layout's for the schema to be emitted — this is documented in usage.md