Feature request: add an onInit to InstantSearch component (React)

[MidasVE]

Issue I currently have:
There is a layout shift when having a lot inside your InstantSearch component because everything in the InstantSearch component gets loaded after the InstantSearch component is loaded.
It would be nice to have an onInit or initialState or loadingState attribute to make it possible to show some kind of a loading state first, then replace the InstantSearch children once initialized.

[Haroenv]

Have you considered using server side rendering to prevent the layout shift?