feat: implement automated Lighthouse CI testing for sitemap URLs with dedicated configuration and scripts.

package.json

@@ -37,6 +37,7 @@
     "zod": "^4.3.6"
   },
   "devDependencies": {
+    "@lhci/cli": "^0.15.1",
     "@tailwindcss/cli": "^4.1.18",
     "@tailwindcss/postcss": "^4.1.18",
     "@types/node": "^22.19.3",
@@ -74,7 +75,9 @@
     "directus:push:testing": "./scripts/sync-directus.sh push testing",
     "directus:pull:testing": "./scripts/sync-directus.sh pull testing",
     "directus:push:prod": "./scripts/sync-directus.sh push production",
-    "directus:pull:prod": "./scripts/sync-directus.sh pull production"
+    "directus:pull:prod": "./scripts/sync-directus.sh pull production",
+    "pagespeed:test": "tsx ./scripts/pagespeed-sitemap.ts",
+    "pagespeed:urls": "tsx -e \"import sitemap from './app/sitemap'; sitemap().then(urls => console.log(urls.map(u => u.url).join('\\n')))\""
   },
   "version": "1.0.0"
 }