Fix autoloading of GraphQL::Types

[gmcgibbon]

Followup to #5178

Types reference schema, which reference types, so we need to take the part of schema that reference types, and autoload it.

Currently, if you reference GraphQL::Types::String, you'll get:

graphql-ruby/lib/graphql/schema/built_in_types.rb:6:in `<class:Schema>': unin
itialized constant GraphQL::Types::String (NameError)

      "String" => GraphQL::Types::String,
                                ^^^^^^^^
Did you mean?  StringIO
               STDIN
        from graphql-ruby/lib/graphql/schema/built_in_types.rb:3:in `<module:
GraphQL>'
        from graphql-ruby/lib/graphql/schema/built_in_types.rb:2:in `<top (required)>'
        from /opt/rubies/3.3.6/lib/ruby/3.3.0/bundled_gems.rb:69:in `require'
        from /opt/rubies/3.3.6/lib/ruby/3.3.0/bundled_gems.rb:69:in `block (2 levels) in replace_require'
        from graphql-ruby/lib/graphql/schema.rb:1813:in `<top (required)>'
        from /opt/rubies/3.3.6/lib/ruby/3.3.0/bundled_gems.rb:69:in `require'
        from /opt/rubies/3.3.6/lib/ruby/3.3.0/bundled_gems.rb:69:in `block (2 levels) in replace_require'
        from graphql-ruby/lib/graphql/types/string.rb:5:in `<module:Types>'
        from graphql-ruby/lib/graphql/types/string.rb:4:in `<module:GraphQL>'
        from graphql-ruby/lib/graphql/types/string.rb:3:in `<top (required)>'
        from /opt/rubies/3.3.6/lib/ruby/3.3.0/bundled_gems.rb:69:in `require'
        from /opt/rubies/3.3.6/lib/ruby/3.3.0/bundled_gems.rb:69:in `block (2 levels) in replace_require'
        from (irb):1:in `<main>'
        from <internal:kernel>:187:in `loop'
        from bin/console:8:in `<main>'

This fixes the problem. Sorry for not catching this earlier!

[rmosolgo]

Thanks for the fix! I'll release this very soon... I want to work up a fix for #5178 (comment) too.