feat: add RollyPay payment provider to cabinet frontend

- Payment method label and icon (green gradient, RP)
- Admin settings tree entry for ROLLYPAY category
- Locale strings and descriptions for ru, en, zh, fa

src/constants/paymentMethods.ts

@@ -16,5 +16,6 @@ export const METHOD_LABELS: Record<string, string> = {
   riopay: 'RioPay',
   severpay: 'SeverPay',
   paypear: 'PayPear',
+  rollypay: 'RollyPay',
   manual: 'Ручное пополнение',
 };