add doc for crud inline_form

docs/crud/configuration.md

@@ -108,10 +108,11 @@ All fields have these options:
 | `sort`             | `array|callable` | `null`                                    | Defines how to sort                                        |
 | `href`             | `string|callable` | `null`                                    | Data to generate a link |
 | `href_attr`             | `array|callable` | `null`                                    | Attributes of the link |
+| `inline_form`             | `null|callable` | `null`                                    | A method to define a form to edit datas |
 
-Examples:
 
 ```
+// Example #0
 $configuration->setField('index', 'My field', TextField::class, [
     'property' => 'myProperty',
     // OR
@@ -120,6 +121,7 @@ $configuration->setField('index', 'My field', TextField::class, [
     },
 ])
 
+// Example #1
 $configuration->setField('index', 'My field', TextField::class, [
     'raw' => true,
     'property_builder' => function($entity, array $options) {
@@ -127,6 +129,7 @@ $configuration->setField('index', 'My field', TextField::class, [
     },
 ])
 
+// Example #2
 // https://127.0.0.7:8000/admin/my_entity?_sort=property&_sort_direction=asc
 $configuration->setField('index', 'My field', TextField::class, [
     'property' => 'myProperty'
@@ -136,6 +139,21 @@ $configuration->setField('index', 'My field', TextField::class, [
         $query->orderBy('.myProperty', $direction);
     }],
 ])
+
+// Example #3
+use Symfony\Component\Form\FormBuilderInterface;
+use Symfony\Component\Form\Extension\Core\Type\TextType;
+use Symfony\Component\Validator\Constraints\NotBlank;
+
+$configuration->setField('index', 'My field', TextField::class, [
+    'property' => 'myProperty',
+    'inline_form' => function(FormBuilderInterface $builder, EntityInterface $entity) {
+        $builder->add('myProperty', TextType::class, [
+            'required' => true,
+            'constraints' => [new NotBlank()],
+        ]);
+    }
+])
 ```
 
 ### TextField