Enable prefetch and experimental client prerender in Astro config

The commit introduces prefetch in the Astro configuration to improve initial load speed. Additionally, it enables an experimental feature, clientPrerender, to potentially enhance rendering performance. Changes have been made keeping both functionality and performance improvements in mind.

astro.config.mjs

@@ -7,11 +7,15 @@ import compressor from "astro-compressor";
 // https://astro.build/config
 export default defineConfig({
   // https://docs.astro.build/en/guides/images/#authorizing-remote-images
+  site: 'https://screwfast.uk',
   image: {
     domains: ["images.unsplash.com"],
   },
-  site: 'https://screwfast.uk',
+  prefetch: true,
   integrations: [tailwind(), sitemap(), compressor({ gzip: false, brotli: true })],
   output: 'static',
+  experimental: {
+    clientPrerender: true
+  },
   adapter: vercelStatic()
 });