feat: add copyright notice configuration to nativephp.php (#534)

Author: WINBIGFOX

config/nativephp.php

@@ -31,6 +31,11 @@
      */
     'author' => env('NATIVEPHP_APP_AUTHOR'),
 
+    /**
+     * The copyright notice for your application.
+     */
+    'copyright' => env('NATIVEPHP_APP_COPYRIGHT'),
+
     /**
      * The default service provider for your application. This provider
      * takes care of bootstrapping your application and configuring