docs: add notes + missing links for user guide (#11621)

* docs: add notes + missing links for user guide

* fix build errors

* fixes

www/apps/resources/app/commerce-modules/order/exchange/page.mdx

@@ -8,6 +8,12 @@ export const metadata = {
 
 In this document, you’ll learn about order exchanges.
 
+<Note title="Looking for no-code docs?">
+
+Refer to this [Medusa Admin User Guide](!user-guide!/orders/exchanges) to learn how to manage an order's exchanges using the dashboard.
+
+</Note>
+
 ## What is an Exchange?
 
 An exchange is the replacement of an item that the customer ordered with another.