feat: Add support for authentication to the sdk, and plug it in the admin (#7349)

* feat: Add support for authentication to the sdk, and plug it in the admin

* fix: await fetch before returning in sdk

packages/admin-next/dashboard/package.json

@@ -33,6 +33,7 @@
     "@dnd-kit/sortable": "^8.0.0",
     "@hookform/resolvers": "3.3.2",
     "@medusajs/icons": "1.2.1",
+    "@medusajs/js-sdk": "0.0.1",
     "@medusajs/ui": "3.0.0",
     "@radix-ui/react-collapsible": "1.0.3",
     "@radix-ui/react-hover-card": "^1.0.7",