refactor: deprecate using proxy with anonymous class

src/Proxy.php

@@ -60,6 +60,15 @@ public function __construct(
             );
         }
 
+        if ((new \ReflectionClass($object::class))->isAnonymous()) {
+            trigger_deprecation(
+                'zenstruck\foundry', '1.37.0',
+                'Using a proxy factory with an anonymous class is deprecated and will throw an error in Foundry 2.0. Use "%s" instead.',
+                ObjectFactory::class,
+                $object::class,
+            );
+        }
+
         $this->class = $object::class;
         $this->autoRefresh = Factory::configuration()->defaultProxyAutoRefresh();
     }

tests/Unit/ProxyTest.php

@@ -43,6 +43,7 @@ public function can_force_get_and_set_non_public_properties(): void
 
     /**
      * @test
+     * @group legacy
      */
     public function can_access_wrapped_objects_properties(): void
     {