docs: translation module (#14271)

* docs: translation module

* fix link in JS SDK

* add translations user guides [WIP]

* updates

* fix broken link

* remove mentions of default locale

* change header

* updates

* updated user guides

* handle todos

* fix build error

* fix lint errors

www/apps/resources/utils/get-sidebar-for-path.ts

@@ -105,6 +105,7 @@ const sidebarMappings: {
       "/references/stock-location",
       "/references/store",
       "/references/tax",
+      "/references/translation",
       "/references/user",
     ],
   },