Add URL signing for localized routes

[fyrts]

I've implemented signedLocalizedRoute and temporarySignedLocalizedRoute macros for Laravel's UrlGenerator, analogous to signedRoute and temporarySignedRoute.

use Illuminate\Support\Facades\URL;
 
return URL::signedLocalizedRoute('unsubscribe', ['user' => 1]);

use Illuminate\Support\Facades\URL;
 
return URL::temporarySignedLocalizedRoute(
    'unsubscribe', now()->addMinutes(30), ['user' => 1]
);