The antd locale to apply, or undefined to inherit.
undefined means the consumer already has a ConfigProvider, so the
table must not override it. A value means there is none, and antd's
components would otherwise fall back to their built-in defaults - which
are Chinese, not English.
Whether an antd ConfigProvider locale was found in the tree.
ProTable's message bundle, derived from the surrounding antd locale.
The library's own strings, defaults merged with any override.
Everything
CrudTableneeds to render in the right language.