abbility to stick with zod instead of using nestjs-zod

[mohrazzak]

This is important so if something new introduced to zod
We dont have to wait nestjs-zod to support it

[Hatko]

We have a monorepo setup and reuse the validation objects. Since nestjs-zod is only installed on the API, we have a script that changes the imports after the file has been generated. Would be cool to configure it what to use