Add italian localization

- Added it locale
- Add it language ro other config files (nginx.conf, vite.config.ts, i18n.ts)

nginx.conf

@@ -26,7 +26,7 @@ http {
         root /usr/share/nginx/html;
         index index.html;
         
-        rewrite ^/(en|de|zh|vi)/(.*)$ /$2 last;
+        rewrite ^/(en|de|zh|vi|it)/(.*)$ /$2 last;
 
         location ~* \.html$ {
             expires 1h;