docs(ui,docs): Add documentation for Medusa UI 2.0.0 (#5227)

* add docs for medusa ui 2.0.0

* fix: copy as child example

* fix: dropdown menu example

* add accordion examples

* fix lint issues

* fix apos in progress tabs demo

* resolve comments

* add icon

* bump z-index on modals to prevent clashing with navbar

* add sidebar item and card

* undo modal z index changes

* add links to updated and new components

* update version

* rm inline code formatting on links

---------

Co-authored-by: Shahed Nasser <shahednasser@gmail.com>

www/apps/docs/sidebars.js

@@ -1944,6 +1944,23 @@ module.exports = {
         },
       ],
     },
+    {
+      type: "category",
+      label: "Medusa UI",
+      collapsible: false,
+      customProps: {
+        sidebar_is_group_headline: true,
+      },
+      items: [
+        {
+          type: "autogenerated",
+          dirName: "upgrade-guides/medusa-ui",
+          customProps: {
+            reverse: true,
+          },
+        },
+      ],
+    },
     {
       type: "category",
       label: "Modules",