Closes: https://github.com/fleetdm/fleet/issues/45687
Changes:
- Updated the orchestration page to be at /visibility-and-reporting, and
updated the content and layout to match the latest wireframes
- Added a redirect for /orchestration going to /visibility-and-reporting
- Removed unused images
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## Summary by CodeRabbit
* **New Features**
* Launched redesigned "Visibility & Reporting" marketing page: new hero,
CTAs, feature sections, testimonials (including scrollable tweets), and
parallax background.
* Added site navigation entry for "Visibility & reporting" and redirect
from /orchestration to /visibility-and-reporting.
* **Style**
* New responsive heading styles and a dedicated page stylesheet for
improved layout, spacing, and mobile behavior.
* **Behavior**
* Testimonials payload simplified — personalization-driven headline
variations removed.
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