feat: Allow optimal routing

Introduced a new field to allow bypassing middleware when possible

Author: syrusakbary

packages/next-intl/src/middleware/middleware.tsx

@@ -266,7 +266,9 @@ export default function createMiddleware<
       } else {
         const internalHref = formatPathname(
           unprefixedInternalPathname,
-          getLocaleAsPrefix(locale),
+          resolvedRouting.optimalRouting
+            ? undefined
+            : getLocaleAsPrefix(locale),
           request.nextUrl.search
         );
 

packages/next-intl/src/routing/config.tsx

@@ -66,6 +66,12 @@ export type RoutingConfig<
    **/
   alternateLinks?: boolean;
 
+  /**
+   * Allows having the optimal routing for the current request by bypassing middleware
+   * and using the default locale when no locale is presented via the URL or domains.
+   **/
+  optimalRouting?: boolean;
+
   /**
    * By setting this to `false`, the cookie as well as the `accept-language` header will no longer be used for locale detection.
    * @see https://next-intl.dev/docs/routing/middleware#locale-detection