title: How do you set a default policy in Laravel Nova?
body: <p>Following this, everything works great:</p>
  <p><a href="https://laravel.com/docs/8.x/authorization#generating-policies" rel="nofollow noreferrer">https://laravel.com/docs/8.x/authorization#generating-policies</a></p>
  <p>However, for better security practices, I'd like to have it so that if no policy is set, a Nova resource will default to my ReadOnlyPolicy.php.</p>
  <p>Currently, if no policy is set, Nova sets all permissions to true which seems like a bad idea in case a future dev creates a model but forgets to create a policy for it. What's the best way to accomplish this?</p>