Move public types from the global.PothosSchemaTypes to module exports

[unrevised6419]

This will allow not pollute the global namespace, and live only inside the module.

Here is a PR that would make this work unrevised6419#1
It can be done with a global.PothosSchemaTypes back compat but there are some caveats

tl;dr

Instead of

declare global {
  export namespace PothosSchemaTypes {
    // ...
  }
}

To do

declare module '@pothos/core/types' {
  // ...
}