auto-gen: SDK changes (28bb4f90)

[luismeli10]

Automated code generation.

generation_id: 28bb4f90-791a-40bf-9858-30c0c0b28f46

Review required before merge.

[luismeli10]

Automated reviewer warnings

This pull request was created with the following advisory findings. Review them before merging:

• plan does not cover impacted repository paths: tests/MercadoPago/Resources/Mocks/Response/Order/order_checkout_pro.json, src/MercadoPago/Resources/Order/Payment.php, src/MercadoPago/Resources/Payment/Order.php, examples/AdvancedPayment/crea
• required symbol is not proven by loaded repository context: PreferenceClient::create
• required symbol is not proven by loaded repository context: OrderClient::create
• README.md, sección «🌟 Getting started with payment via Checkout Pro»: falta un ejemplo completo de Checkout Pro vía Orders API, solicitado explícitamente. Debe crear una order mediante POST a https://api.mercadopago.com/v1/orders con Author
• README.md: falta documentar el resultado esencial de la creación de la order: conservar el id de la order y redirigir al comprador a checkout_url.
• README.md: el contenido de Preferences conserva el encabezado «### Step 3: Create customer's preference before proceeding to Checkout Pro page» aunque los pasos 1 y 2 fueron eliminados. Actualizar la numeración o reestructurar los encabezad