Allow setting direction (RTL or LTR)

React-window grids have a 'direction' prop, which allow them to be used in a left-to-right context.

However, react-base-table doesn't expose this prop and always sets the direction to 'ltr on the grid'.

Would it be possible to expose the direction property in react-base-table?

首先追踪 react-base-table 如何配置其 grid，以及当前如何将方向固定为 ltr。确定组件的公共入口点和现有的 grid 属性测试，然后验证 RTL 和 LTR 值都能被接受并一致地应用。

由索引模型根据 Issue 内容生成。