feat: add PayPear payment provider to cabinet frontend

- Payment method label and icon (amber gradient)
- Admin settings tree entry for PAYPEAR category
- Locale strings for ru, en, zh, fa

src/locales/ru.json

@@ -1972,6 +1972,7 @@
         "payments_wata": "Wata",
         "payments_riopay": "RioPay",
         "payments_severpay": "SeverPay",
+        "payments_paypear": "PayPear",
         "subs_core": "Основные",
         "subs_trial": "Пробный период",
         "subs_pricing": "Цены",