fix(dashboard): Add global errorElement (#10981)

Resolves CMRC-627

**What**
- If the session expired, and the user then navigated to a route with no loader the request for the user info in the sidebar would fail causing the app to crash as we didn't have an errorElement wrapping the app shell.
- This PR adds a top level errorElement which handles errors that are outside of a page context, such as in the sidebar.

.changeset/tasty-plums-tan.md

@@ -0,0 +1,5 @@
+---
+"@medusajs/dashboard": patch
+---
+
+fix(dashboard): Add global errorElement

packages/admin/dashboard/src/providers/router-provider/route-map.tsx

@@ -12,10 +12,10 @@ import { taxRegionLoader } from "../../routes/tax-regions/tax-region-detail/load
 import { RouteExtensions } from "./route-extensions"
 import { SettingsExtensions } from "./settings-extensions"
 
-// TODO: Add translations for all breadcrumbs
 export const RouteMap: RouteObject[] = [
   {
     element: <ProtectedRoute />,
+    errorElement: <ErrorBoundary />,
     children: [
       {
         element: <MainLayout />,