Create Drupal AI Demo Page on new.drupal.org

## Issue Summary
The Drupal Association will launch a dedicated **Drupal AI demo page** on [new.drupal.org](https://new.drupal.org).
This page will follow the structure and user experience of the existing **Drupal CMS** demo/trial pages, but will focus exclusively on AI capabilities in Drupal.

The demo will be available for **7 days** and will initially feature a single provider, with the ability to expand to multiple providers in the future.

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## Requirements

### Functional
1. **Page Structure**
- Hero section with title, short value statement, and clear call-to-action (CTA).
- Four icon-based feature highlights.
- Instructional section explaining available demo experiences.
- Lead capture form (email, name, organisation, job title, country, terms/privacy).
- Provider highlight section (for current demo host).
- Standard Drupal.org footer.

2. **Demo Parameters**
- Duration: 7 days.
- Provisioning: within minutes of form submission.
- Demo types (initial suggestions):
1. Content & Marketing AI
2. Accessibility & Inclusive Design AI
3. Developer Sandbox with AI APIs

3. **Lead Form**
- Embedded form or API integration.
- Data collection aligned with Drupal Association privacy policies.
- Terms and Privacy Policy checkboxes required.

4. **Branding & Design**
- Maintain Drupal.org brand guidelines and visual style.
- AI-themed visuals aligned with Drupal’s design system.
- Mobile-first, responsive layout.

5. **Analytics**
- Track page visits, form completions, and demo activations.
- Provide regular reporting.

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## Responsibilities
- **Drupal.org Web Team**: Build, design, copywriting, QA, and integration.
- **Drupal Association**: Provide staging environment, access, and content/visual approvals.

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## Acceptance Criteria
- Page published on new.drupal.org with approved copy and visuals.
- Demo form functional and provisioning environment successfully.
- Cross-browser and device testing complete.
- Analytics implemented and verified.

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## References
- Drupal CMS pages for structure and style:
- https://new.drupal.org/drupal-cms
- https://new.drupal.org/drupal-cms/trial

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## Next Steps
1. Confirm provider details and demo experience options.
2. Build page on staging for review.
3. Approve content, design, and technical implementation before launch.