Add `Paginator` interface to all paginated fields

I am willing to work on this feature if someone could provide the necessary context to get me going.

Is your feature request related to a problem? Please describe.
I am trying to use fragments to extract information from the paginatorInfo field on multiple paginated fields but, as it stands, Lighthouse generates a unique type for each paginated field:

# Example of such a type
type VideoPaginator {
  paginatorInfo: PaginatorInfo!
  data: [Video!]!
}

Describe the solution you'd like
I suggest we add an interface to the generated types called Paginator:

union Paginated = Video | Post | ... #all fields with @paginated would appear here

interface Paginator {
  paginatorInfo: PaginatorInfo!
  data: [Paginated!]!
}

type VideoPaginator implements Paginator {
  paginatorInfo: PaginatorInfo!
  data: [Video!]!
}

Describe alternatives you've considered

I have not considered any other solutions but would love to hear other's ideas.

A brief outline of how to approach this problem in the context of the internal workings of Lighthouse would be helpful as I am not familiar with how things work.

Start by locating the generated paginator types and the @paginated directive in Lighthouse, then trace how their fields and GraphQL types are assembled. The issue's proposed Paginator interface and shared fragment behavior define the desired outcome, but alternative designs and the exact affected entry points still need investigation.