Install the Cart + Shipment feature

<?php

namespace Pyz\Zed\Cart;

use Spryker\Zed\Cart\CartDependencyProvider as SprykerCartDependencyProvider;
use Spryker\Zed\Kernel\Container;
use Spryker\Zed\ShipmentCartConnector\Communication\Plugin\Cart\CartShipmentCartOperationPostSavePlugin;
use Spryker\Zed\ShipmentCartConnector\Communication\Plugin\Cart\SanitizeCartShipmentItemExpanderPlugin;

class CartDependencyProvider extends SprykerCartDependencyProvider
{
    /**
     * @param \Spryker\Zed\Kernel\Container $container
     *
     * @return \Spryker\Zed\CartExtension\Dependency\Plugin\ItemExpanderPluginInterface[]
     */
    protected function getExpanderPlugins(Container $container)
    {
        return [
            new SanitizeCartShipmentItemExpanderPlugin(),
        ];
    }

    /**
     * @param \Spryker\Zed\Kernel\Container $container
     *
     * @return \Spryker\Zed\CartExtension\Dependency\Plugin\CartOperationPostSavePluginInterface[]
     */
    protected function getPostSavePlugins(Container $container)
    {
        return [
            new CartShipmentCartOperationPostSavePlugin(),
        ];
    }
}

<?php

namespace Pyz\Zed\Checkout;

use Spryker\Zed\Checkout\CheckoutDependencyProvider as SprykerCheckoutDependencyProvider;
use Spryker\Zed\Kernel\Container;
use Spryker\Zed\ShipmentTypeCart\Communication\Plugin\Checkout\ShipmentTypeCheckoutPreConditionPlugin;

class CheckoutDependencyProvider extends SprykerCheckoutDependencyProvider
{
    /**
     * @param \Spryker\Zed\Kernel\Container $container
     *
     * @return list<\Spryker\Zed\CheckoutExtension\Dependency\Plugin\CheckoutPreConditionPluginInterface>
     */
    protected function getCheckoutPreConditions(Container $container): array
    {
        return [
            new ShipmentTypeCheckoutPreConditionPlugin(),
        ];
    }
}