feat: add Lava payment provider support

- METHOD_LABELS entry for lava
- Custom SVG icon: dark base with orange-red lava flow and ember dots
- Admin settings tree node: payments_lava
- Locale strings (ru/en/zh/fa) for descriptions and admin labels

src/components/admin/constants.ts

@@ -59,6 +59,7 @@ export const SETTINGS_TREE: SettingsTreeConfig = {
         { id: 'payments_antilopay', categories: ['ANTILOPAY'] },
         { id: 'payments_jupiter', categories: ['JUPITER'] },
         { id: 'payments_donut', categories: ['DONUT'] },
+        { id: 'payments_lava', categories: ['LAVA'] },
         { id: 'payments_apple_iap', categories: ['APPLE_IAP'] },
       ],
     },