Feat: add zod for object validation

[cre8]

Using zod could help to validate objects before dealing with them. This should be implemented for all packages where required

[lukasjhan]

Can you tell me what examples there are?

[cre8]

It would help to validate variables. So instead of

if(jwk.exp && typeof jwk.exp === number) {

}

you could go with

const schema = z.number();
schema.parse(jwk.exp)

While I think ZOD is nice, I do not see so many values that we need to type check for validation (Timo brought the topic up in one of the issues)