request: provide nested data for otherFormes

[favna]

Is there an existing issue or pull request for this?

• I have searched the existing issues and pull requests

Feature description

Currently the otherFormes field for a Pokemon is an array of strings, however, this field could be a nested reference to the actual Pokémon. This is currently blocked by #900 as v8 cannot handle so much data, but once that issue is resolved this should be changed.

Desired solution

• The otherFormes should be a [Pokemon!] type instead of a [String!] type
• The mappers should be updated to match

Alternatives considered

N.A.

Additional context

The bulk of the changes are already done in #899.