Extended dynamic input queries

[wilkerlucio]

Allow a user query to extend a nested input from a resolver.

In the following example scenario:

(pco/defresolver all-people3 [{:swapi.Root/keys [allPeople]}]
  {::pco/input
   [{:swapi.Root/allPeople
     [{:swapi.PeopleConnection/people
       [:swapi.types/Person]}]}]

   ::pco/output
   [{:swapi/all-people
     [:swapi.types/Person]}]}
  {:swapi/all-people
   (get allPeople :swapi.PeopleConnection/people)})

With that setup, that re-shapes data from a dynamic source, a user query like:

[{:swapi/all-people
  [:swapi.Person/name]}]

Should extend the sub-query at :swapi.PeopleConnection/people.

One point to consider is that a query input/output may have multiple nested points, and how to move from where to where needs to be defined somehow.

My first idea would be to add some parameters to mark the compatible extensions.

This needs more thought.