Allow no initial active option in the Combobox

[Sendrel]

Right now... the first option is always active in the combobox... whenever you press "Enter"... since the first option is active... it will be selected... I would like a functionality similar to google search box...

No initial option selected

A functionality opposite to this #1279
I think there is already some interest for this feature. #1279 (comment)

I've checked the codebase.. I think it is a pretty simple pr.
https://github.com/tailwindlabs/headlessui/blob/11157a80247af85a82ce076f61420b32666eb6d5/packages/%40headlessui-react/src/components/combobox/combobox.tsx#L559C3-L559C3

https://github.com/tailwindlabs/headlessui/blob/11157a80247af85a82ce076f61420b32666eb6d5/packages/%40headlessui-react/src/components/combobox/combobox.tsx#L590C9-L590C44

I would be willing to do this PR if approved.

I am requesting for something like a noInitialOptionActive prop