docs: avoid loading fa web fonts when not needed

docs/.vitepress/theme/styles.css

@@ -1,5 +1,3 @@
-@import url('https://fonts.googleapis.com/css2?family=Vazirmatn:wght@100..900&display=swap');
-
 :root:where(:lang(fa)) {
   --vp-font-family-base:
     'Vazirmatn', 'Inter', ui-sans-serif, system-ui, sans-serif,

docs/fa/config.ts

@@ -9,6 +9,13 @@ export default defineAdditionalConfig({
   description: 'ژنراتور استاتیک وب‌سایت با Vite و Vue',
   dir: 'rtl',
 
+  // prettier-ignore
+  head: [
+    ['link', { rel: 'preconnect', href: 'https://fonts.googleapis.com' }],
+    ['link', { rel: 'preconnect', href: 'https://fonts.gstatic.com', crossorigin: '' }],
+    ['link', { href: 'https://fonts.googleapis.com/css2?family=Vazirmatn:wght@100..900&display=swap', rel: 'stylesheet' }],
+  ],
+
   themeConfig: {
     nav: nav(),