docs: added tutorial for abandoned cart (#11917)

* docs: added tutorial for abandoned cart

* small fixes

* add cover image

www/apps/resources/generated/generated-how-to-tutorials-sidebar.mjs

@@ -340,6 +340,15 @@ const generatedgeneratedHowToTutorialsSidebarSidebar = {
       "title": "Tutorials",
       "description": "Tutorials are step-by-step guides that take you through implementing a specific use case in Medusa. You can follow these guides whether you're a beginner or an experienced Medusa developer.\n\nWhile tutorials show you a specific use case, they also help you understand how to implement similar use cases in your own projects. Also, you can implement the use case in a tutorial differently to fit your business requirements.",
       "children": [
+        {
+          "loaded": true,
+          "isPathHref": true,
+          "type": "link",
+          "title": "Abandoned Cart",
+          "path": "/how-to-tutorials/tutorials/abandoned-cart",
+          "description": "Learn how to send abandoned cart notifications to customers.",
+          "children": []
+        },
         {
           "loaded": true,
           "isPathHref": true,