docs(ui,docs): added upgrade guides link to UI docs (#5240)

* added medusa ui index page

* remove console

www/apps/docs/src/utils/reverse-sidebar.js

@@ -0,0 +1,27 @@
+function reverseSidebarItems(sidebarItems, categoryItem) {
+  let result = sidebarItems
+  if (categoryItem.customProps?.reverse) {
+    // Reverse items in categories
+    result = result.map((item) => {
+      if (item.type === "category") {
+        return { ...item, items: reverseSidebarItems(item.items, categoryItem) }
+      }
+      return item
+    })
+    // Reverse items at current level
+    // use localeCompare since the reverse array method doesn't account for
+    // numeric strings
+    result.sort((a, b) => {
+      const aToCompare = a.id || a.href || a.value || ""
+      const bToCompare = b.id || b.href || b.value || ""
+      const comparison = aToCompare.localeCompare(bToCompare, undefined, {
+        numeric: true,
+      })
+
+      return comparison < 0 ? 1 : comparison > 0 ? -1 : 0
+    })
+  }
+  return result
+}
+
+module.exports = reverseSidebarItems