docs: added order edit documentation pages (#2885)

www/docs/sidebars.js

@@ -267,6 +267,11 @@ module.exports = {
               id: "advanced/storefront/implement-claim-order",
               label: "Implement Claim Order"
             },
+            {
+              type: "doc",
+              id: "advanced/storefront/handle-order-edits",
+              label: "Handle Order Edits"
+            },
             {
               type: "doc",
               id: "advanced/storefront/use-sales-channels",
@@ -313,6 +318,11 @@ module.exports = {
               id: "advanced/admin/manage-discounts",
               label: "Use Discount APIs"
             },
+            {
+              type: "doc",
+              id: "advanced/admin/order-edit",
+              label: "Edit an Order"
+            },
           ]
         },
         {