refactor(orders): rename OrdersReceived to ReceivedOrders; add warehouse module label

Renames the received-orders page for naming consistency, updates the Orders tab
import and the issued-order create button label, and adds the Sklad module
label to role management.

src/admin/pages/Settings.tsx

@@ -113,6 +113,7 @@ const MODULE_LABELS: Record<string, string> = {
   orders: "Objednávky",
   projects: "Projekty",
   invoices: "Faktury",
+  warehouse: "Sklad",
   customers: "Zákazníci",
   users: "Uživatelé",
   settings: "Nastavení",