Add public PerformWP site scan workflow for growth and education

Summary

Add a public PerformWP site scan workflow for lead generation and performance education.

This belongs to the website/growth surface rather than the core plugin runtime, but it should align with the Perform product roadmap.

Proposed scope

• Add a public scan form on performwp.com.
• Collect only the target URL and optional email after showing results.
• Show safe, high-level checks:
  • TTFB
  • compression
  • page size
  • mobile lab score or external test link if integrated later
  • caching/header hints where available
• Route recommendations to Perform docs, feature pages, and the draft content strategy.
• Do not make unverifiable field Core Web Vitals claims from a single scan.

Acceptance criteria

• A visitor can run a scan without logging in.
• Results are clear, limited, and privacy-conscious.
• Email capture is optional and consent-based.
• Recommendations map to Perform features or content.
• Any external API usage is documented before implementation.

Start with the proposed public scan form on performwp.com and the acceptance criteria. Define the URL input, optional consent-based email flow, safe result checks, recommendation links, and external API documentation boundary. Done means an unauthenticated visitor receives limited, privacy-conscious results without unverifiable Core Web Vitals claims.