Update zod to v3

[androsj]

What do you want and why?

I just noticed blitz is using zod v1, both internally and in generated apps.

How do you feel about updating to v3?

Here's the branch with the list of breaking changes:
https://github.com/colinhacks/zod/tree/v3

[flybayer]

We'll definitely upgrade to v3 as soon as it's stable!

[androsj]

Gotcha. I thought maybe it was "stable enough", even though it's still tagged as alpha.

👍🏻✌🏻

[zanami]

May 17, 2021: Zod v3 is now in stable release!