Create global BatchRouter like you can import Router from "next/router"

[dongyeop-youha]

It will allow query change in situations where you can't use hooks. For example, when using redux saga, where it's outside of components.

It's also needed for #4 because #4 makes useBatchRouter rerender the component when URL is changed. For a component that only changes the URL and not display its state, global BatchRouter is needed for optimization.