Organize the seo, metadata and assets

Remove unused assets.

Rename and relocate other assets.

Update the beta indicator on the footer.

Author: arivvera

public/cascarilla.js-social.webp

@@ -1,9 +1,8 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
   <url>
-    <loc>https://cascarilla.pages.dev/</loc>
-    <lastmod>2025-03-2</lastmod>
+    <loc>""</loc>
+    <lastmod>2025-12-31</lastmod>
     <changefreq>yearly</changefreq>
-    <priority>1.0</priority>
   </url>
 </urlset>