refactor: replace zod with valibot

[funkstyr]

Describe the feature you'd like to request

This will be spike-ish.

Valibot is a more lite weight validator.

Describe the solution you'd like to see

Replace all instances of zod with valibot schemas.

Additional information

• https://mwskwong.com/blog/migrating-from-zod-to-valibot-a-comparative-experience
• https://trpc.io/docs/server/validators#with-valibot

[funkstyr]

Will need to keep zod around for @t3-oss/env-nextjs as it only supports zod but they do have a roadmap item for other vaildator: https://github.com/t3-oss/t3-env?tab=readme-ov-file#roadmap

It is also more straight to use zod with trpc; I think we should just keep using only zod and not have 2 validators within the apps.