Popular v0.6.0

Search-engine optimisation: structured data, crawl plumbing, Core Web Vitals,
and an FAQ block. Zero client JavaScript added.

Added

• Structured data (JSON-LD, byte-identical across both frameworks):
  schema.org/Event on event pages (rich-result eligible, with best-effort
  time parsing; see PARITY.md for the contract), Organization on home
  pages, BlogPosting on blog posts, and FAQPage from FAQ blocks.
• New event fields: cancelled (a visible danger badge and the structured
  status, so they never disagree), online (virtual location), and
  price/currency/cost (paid-event offers).
• FAQ block: {{< faq >}}/{{< question >}} shortcodes (Astro <FAQ>/
  <FAQItem>), native <details> with zero JavaScript, answers in the DOM
  for indexing and AI answer engines. Gated FAQPage JSON-LD via
  seo.faqJsonLd (default true).
• Crawl plumbing: robots.txt advertising the sitemap, og:locale,
  og:image:alt (optional imageAlt field), and an opt-in noindex on
  taxonomy pages (seo.noindexTaxonomies). Astro adds @astrojs/sitemap.
• Core Web Vitals: markdown and card/list images lazy-load with async
  decoding (hero and event lead stay eager); a preconnect to the Font
  Awesome CDN when the default URL is used.
• New SEO and FAQ documentation pages; scripts/check-jsonld.py validates
  every built JSON-LD block in CI.