Support react-i18next "defaults" prop

Support react-i18next "defaults" prop: a task in MiMo-V2.6-RL-oss: Agentic RL Environments (MiMo RL release). Version i18next: <i 11.2.2</i i18next-scanner: <i 2.4.6</i react-i18next: <i 7.7.0</i Configuration react-i18n v7.7.0 introduced the defaults prop (see i18next/react-i18next 439). I expect…

The task

Version i18next: 11.2.2 i18next-scanner: 2.4.6 react-i18next: 7.7.0 Configuration react-i18n v7.7.0 introduced the defaults prop (see i18next/react-i18next#439). I expect the following code: to lead to the following output:

Part of XiaomiMiMo/MiMo-V2.6-RL-oss.