Upgrade Autocomplete to use createRoot

[chartgerink]

This PR upgrades the Autocomplete component to use createRoot as is necessary for utilizing React 18. Fixes #364. It ended up being documented by Algolia too.

Please note that I changed the file from .tsx to .jsx - there were some Typescript errors I did not know how to work around at this point:

Property 'unmount' does not exist on type 'never'.

So if anyone knows their Typescript and can help work around this - I would love your help!

Note: Does not fix #326 - makes it seem a tiny bit less of an issue though?

[chartgerink]

Noticing one issue with the search results not disappearing...

Screen.Recording.2022-07-15.at.15.04.53.mov

[nsunami]

@chartgerink Is it ok to let go and merge this bug to the main? Or, should we fix this before merging?

Noticing one issue with the search results not disappearing...

Screen.Recording.2022-07-15.at.15.04.53.mov

I also reproduced this issue on my end. It seems like blurring does not work consistently. (Sometimes it does—especially when we focus out from the window and back.)

[chartgerink]

I think this is quite the usability issue so I'd rather not merge to be honest and keep the warning.

We could fix this but I'm also not sure where to start. Seems like all of this (plus the blurring issue) is starting to make me wonder whether the Algolia implementation is the best route here.

[chartgerink]

Closing this as a wontfix for now. If we ever need to come back to it we can...