Unify workspace dropdowns; Update layouts (#458)

Unified Account and Workspace drop-downs; Layout updates, now header lives within the PageBody component; Sidebars now use floating variant

apps/web/app/[locale]/home/(user)/billing/error.tsx

@@ -0,0 +1,7 @@
+'use client';
+
+// We reuse the page from the billing module
+// as there is no need to create a new one.
+import BillingErrorPage from '~/home/[account]/billing/error';
+
+export default BillingErrorPage;