Redirects via Frontmatter

done

Redirect old URLs to new ones via aliases in frontmatter, generating HTML meta-refresh files

Support aliases: ["/old-path", "/another-old-path"] in frontmatter. During build, generate lightweight HTML files at each alias path containing a <meta http-equiv="refresh"> redirect to the canonical URL. Essential for site migrations from WordPress or other SSGs without breaking inbound links and SEO equity. Also generate a _redirects file for Netlify/Cloudflare compatibility.