indiecheck

feat: site checks, generator-aware fixes, Markdown export and CI mode

- robots.txt: missing, blocking every crawler, declared sitemaps,
  /sitemap.xml fallback. 429 and 5xx count as "couldn't check",
  not as missing.
- Domain: plain http, rel=canonical on another host, www and bare
  domain both serving the site without a redirect.
- Fixes for a missing h-card, rel=me, feed or Webmention endpoint
  say where the code goes in WordPress, Hugo or Eleventy when the
  generator meta tag names one.
- format=markdown returns the report as Markdown.
- fail=errors|warnings answers HTTP 412 when there are findings at
  that level, for CI.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Pablo Murad

feat: microformats and IndieWeb checker

Pablo Murad