Add form attribute on SyliusCrudRoute

[loic425]

Q	A
Bug fix?	no
New feature?	yes
BC breaks?	no
Deprecations?	no
Related tickets
License	MIT

It's a missing feature between yaml and attributes routes.

<?php 

#[SyliusRoute(
    name: 'register',
    path: '/users/register',
    methods: ['GET', 'POST'],
    controller: 'app.controller.user:createAction',
    form: RegisterType::class
)]
class User

[Zales0123]

Thank you, Loïc! 🥇