[5.x] Ensure nav blueprint graphql types are registered

[ryanmitchell]

When using GraphQL to query a nav which has a replicator in the blueprint, you get an error showing the type has not been defined.

This PR ensures the types get registered and the error goes away.

I tried doing this using the types() method on the interface but it didn't seem to get called.

[jasonvarga]

I believe you can add a static addTypes method like on PageInterface and call it from TypeRegistrar.

cms/src/GraphQL/Types/PageInterface.php

Line 27 in ecaed56

public static function addTypes()

cms/src/GraphQL/TypeRegistrar.php

Line 68 in ecaed56

PageInterface::addTypes();

[ryanmitchell]

Thanks @jasonvarga that was the missing piece in the puzzle