Replace sitemap index with plain urlset listing actual pages

The old sitemap index pointed to /{name}/sitemap.xml sub-sitemaps that
don't exist. Replace with a standard urlset that lists the homepage and
each repo landing page at their actual clean URLs.

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

Author: greynewell

generate-index.go

@@ -82,13 +82,14 @@ func main() {
 func generateSitemap(cfg Config) error {
 	var b strings.Builder
 	b.WriteString(`<?xml version="1.0" encoding="UTF-8"?>` + "\n")
-	b.WriteString(`<sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">` + "\n")
+	b.WriteString(`<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">` + "\n")
+	b.WriteString(fmt.Sprintf("  <url>\n    <loc>%s/</loc>\n    <priority>1.0</priority>\n  </url>\n", baseURL))
 	for _, cat := range cfg.Categories {
 		for _, repo := range cat.Repos {
-			b.WriteString(fmt.Sprintf("  <sitemap>\n    <loc>%s/%s/sitemap.xml</loc>\n  </sitemap>\n", baseURL, url.PathEscape(repo.Name)))
+			b.WriteString(fmt.Sprintf("  <url>\n    <loc>%s/%s/</loc>\n    <priority>0.8</priority>\n  </url>\n", baseURL, url.PathEscape(repo.Name)))
 		}
 	}
-	b.WriteString("</sitemapindex>\n")
+	b.WriteString("</urlset>\n")
 	return os.WriteFile("site/sitemap.xml", []byte(b.String()), 0644)
 }