Default inbetween objects for schemas

[mrjvs]

What feature do you want?

Add defaults inbetween schema objects.

So that in cases like this: You dont get the error "$.server is required", instead it will error on $.server.port is required.

z.object({
  server: z.object({
    port: z.coerce.number()
  })
})

Which package/app is this targeted at (leave empty if unsure)

@neato/config

Goals

1. Clearer error messages

Extra details

This should probably be an opt-in setting, this behaviour could be unexpected for library users.