setup algolia docsearch for ar.reactjs.org and use arabic widget

[Fcmam5]

We should setup a proper algolia application for ar.reactjs.org with a widget in Arabic.

https://github.com/reactjs/ar.reactjs.org/blob/8c6b8d497a6bc2eda3b2c5b9862c8cfc2b7e383a/src/components/LayoutHeader/DocSearch.js#L26

[iRayan7]

@tesseralis

[tesseralis]

Sure! to do this you need to change the DocSearch API key

One of the maintainers needs to sign up for DocSearch here

I don't know how the Arabic widget works but the Algolia person is usually pretty helpful.

[Fcmam5]

I got the API key for it, I'm gonna submit a PR :)