Add GraphQL::Schema::Subset as an alternative type-visibility implementation

Add GraphQL::Schema::Subset as an alternative type-visibility implementation: a task in bird-critic-1.5-full-300 (Harbor dataset). graphql-ruby is a pure Ruby gem providing GraphQL execution for Ruby apps. Type visibility — controlling which schema members are visible per-request — has long been…

The task

graphql-ruby is a pure Ruby gem providing GraphQL execution for Ruby apps. Type visibility — controlling which schema members are visible per-request — has long been handled by `GraphQL::Schema::Warden`. This task introduces `GraphQL::Schema::Subset` as an alternative implementation with the same public API but…

Part of kochsnow/bird-critic-1.5-full-300.