feat(docs): SEO and AI SEO improvements

[VictorlBueno]

Summary

Comprehensive SEO and AI SEO overhaul across all files in /docs.

• index.html

  • OG image changed from favicon.png to the actual screenshot-banner.png (critical for social sharing)
  • Twitter card upgraded from summary to summary_large_image + twitter:image added
  • JSON-LD expanded from 1 schema to 3: SoftwareApplication (all 3 OS, full featureList, 5 screenshots), WebSite, and FAQPage (7 Q&As)
  • Added theme-color, application-name, og:image:alt, twitter:image:alt meta tags
  • Updated <meta description> and keywords to include all 5 supported databases and all 3 platforms
  • Added skip-to-content link and <main id="main-content"> landmark for accessibility
  • Added rel="noopener noreferrer" to all 9 external GitHub links
  • Descriptive alt texts on all screenshots
  • First screenshot uses loading="eager" fetchpriority="high" for LCP optimization
  • Added aria-hidden="true" to all decorative SVG icons
  • Added "For AI" footer link pointing to llms.txt

• robots.txt

  • Explicit Allow: / for AI crawlers: GPTBot, ChatGPT-User, anthropic-ai, ClaudeBot, PerplexityBot, Applebot-Extended, Bytespider, CCBot, cohere-ai

• sitemap.xml

  • lastmod updated to current date
  • Added <changefreq>weekly</changefreq> and <priority>1.0</priority>

• llms.txt (complete rewrite)

  • Fixed database support status: MySQL, SQLite, DuckDB, and Databend are now correctly listed as Supported (were listed as "planned")
  • Added Windows and Linux platform details
  • Added keyboard shortcuts feature, ER diagram, inline data editor
  • New sections: comparison table vs DataGrip/DBeaver/TablePlus/Beekeeper, 12 Q&As, technical architecture, 3 suggested AI descriptions, search phrases list

[fhsgoncalves]

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