fix: add required property on input

[Udit-takkar]

Fixes: #3918
Also added checks in /api/book if required customInputs are missing.

Loom Video:- https://www.loom.com/share/01ff8da8e2764a1691f23572a37344a6

[vercel]

@Udit-takkar is attempting to deploy a commit to the cal Team on Vercel.

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[PeerRich]

awesome work! super fast.👏 @hariombalhara can you review and approve this?

[emrysal]

Also have a look at using zod in the book/event endpoint; could be helpful

[Udit-takkar]

@emrysal where exactly can zod be helpful in 'book/event endpoint'. i think it is already being used at the start

 extendedBookingCreateBody.parse(req.body);

[hariombalhara]

Ignore this

[hariombalhara]

I left a comment that needs to be addressed before the merge.

Also, there is a cleaner way to do it using zod, which allows schema validation to work for frontend as well as backend with a single definition. See zodResolver usage in BookingPage.tsx. I wouldn't consider this a blocker for merge but it is good to have.

Thanks again for your contribution @Udit-takkar

Zod changes are done & required behaviour is as intended on checkboxes (e.g. I agree to the terms & conditions)

[emrysal]

Excellent PR - thanks for the contribution and follow ups! 👍