[graphiql] feat: add more root types in schema documentation

Would be awesome to be able to add some more "parent" types to the SchemaDocumentation component, the way we have `query` `mutation` and `subscription`.

My schema currently has a `_typemap` which gets displayed in the `All Schema Types` though the ability to categorize that would be great, like in the example below. These map to the exisiting GraphQL types like
`GraphQLObjectType` `GraphQLEnumType``GraphQLInputObjectType` etc.

Essentially I'd like a feature where we can categorize the types further and not just the ones in ``` const ignoreTypesInAllSchema = [
queryType?.name,
mutationType?.name,
subscriptionType?.name,
];```

I think we have a lot of the functionality for this already in place! Maybe a `categorizeAllTypes / assignAllTypesToRoot` type of prop could do the trick.

Example solution