[Feature Request] Import GraphQL schema as collection

It would be awesome if there was the possibility to generate a collection of requests from a GraphQL schema if introspection is enabled.

Something like this: https://github.com/oshosanya/graphql-export/blob/master/src/exporters/insomnia/insomnia.ts

Start by reviewing the linked graphql-export example at src/exporters/insomnia/insomnia.ts and the issue's GraphQL introspection requirement. Done means an introspection-enabled GraphQL schema can generate a usable collection of requests in Insomnia, with the resulting collection format and supported request details established.

Written by the indexing model from the issue text.