LYNX-186: Create cancellation module (#134)

Author: eliseacornejo

app/code/Magento/OrderCancellationGraphQl/README.md

@@ -0,0 +1,9 @@
+# Magento_OrderCancellationGraphQl module
+
+This module allows to cancel an order and specify the order cancellation reason using GraphQL. Only orders in `RECEIVED`, `PENDING` or `PROCESSING` statuses can be cancelled and if the customer has paid for the order a refund is processed.
+
+This functionality is enabled / disabled by a feature flag that is set at storeView level.
+
+After the cancellation, the customer receive an email confirming it and this cancellation is reflected in the customer's order history.
+
+

app/code/Magento/OrderCancellationGraphQl/composer.json

@@ -0,0 +1,24 @@
+{
+    "name": "magento/module-order-cancellation-graph-ql",
+    "description": "N/A",
+    "config": {
+        "sort-packages": true
+    },
+    "require": {
+        "php": "~8.1.0||~8.2.0",
+        "magento/framework": "*"
+    },
+    "type": "magento2-module",
+    "license": [
+        "OSL-3.0",
+        "AFL-3.0"
+    ],
+    "autoload": {
+        "files": [
+            "registration.php"
+        ],
+        "psr-4": {
+            "Magento\\OrderCancellationGraphQl\\": ""
+        }
+    }
+}

app/code/Magento/OrderCancellationGraphQl/etc/module.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0"?>
+<!--
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+-->
+<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Module/etc/module.xsd">
+    <module name="Magento_OrderCancellationGraphQl"/>
+</config>

app/code/Magento/OrderCancellationGraphQl/registration.php

@@ -0,0 +1,11 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+
+declare(strict_types=1);
+
+use Magento\Framework\Component\ComponentRegistrar;
+
+ComponentRegistrar::register(ComponentRegistrar::MODULE, 'Magento_OrderCancellationGraphQl', __DIR__);

composer.json

@@ -251,6 +251,7 @@
         "magento/module-newsletter-graph-ql": "*",
         "magento/module-offline-payments": "*",
         "magento/module-offline-shipping": "*",
+        "magento/module-order-cancellation-graph-ql": "*",
         "magento/module-page-cache": "*",
         "magento/module-payment": "*",
         "magento/module-payment-graph-ql": "*",