Federation in all plugins

[kamilkisiela]

ardatan/graphql-toolkit#233

[dotansimha]

@kamilkisiela maybe we can add something like?

schema:
   - my-schema.graphql
   - federation

And it will add all required schema types?

Because I'm still not 100% sure that putting Federation code inside the common libs is the best solution.

[kamilkisiela]

@dotansimha by - federation you mean a string that equals federation or a federation.graphql?

I think it should be inside the config because otherwise how do you know plugins should generate something federation-specific and what in case where someone wants to use federation within only one plugin and not the others (same generated file)?

I'm not sure what's bad in putting federation in common lib. There's a shared logic between multiple plugins so it is common.

[dotansimha]

@kamilkisiela ci :)