Centralize types in one __generated__ folder

I'm facing a issue with NextJS that I cannot have a folder like the `__generated__` inside the `pages` folder on my NextJS, I was wondering if have a way to put all the generated types from apollo to one unique folder?

Start by finding Apollo's code-generation option for choosing the output location and compare it with Next.js's handling of folders under pages. Confirm whether all generated types can use one shared folder without creating __generated__ inside pages; done means the configured output works with the reported Next.js setup.

Written by the indexing model from the issue text.