feat: add Etoplatezhi payment provider support

- Add etoplatezhi to METHOD_LABELS for stats charts
- Add PaymentMethodIcon case with green gradient SVG
- Add payments_etoplatezhi to admin settings tree
- Add i18n keys in all 4 locales (en, ru, zh, fa)

src/components/admin/constants.ts

@@ -55,6 +55,7 @@ export const SETTINGS_TREE: SettingsTreeConfig = {
         { id: 'payments_paypear', categories: ['PAYPEAR'] },
         { id: 'payments_rollypay', categories: ['ROLLYPAY'] },
         { id: 'payments_aurapay', categories: ['AURAPAY'] },
+        { id: 'payments_etoplatezhi', categories: ['ETOPLATEZHI'] },
         { id: 'payments_apple_iap', categories: ['APPLE_IAP'] },
       ],
     },