feature request: generate recursive pull patterns for specs

[devth]

e.g. given specs:

{:interface.def/name :interface.person
 :interface.def/fields
 #:person{:person.id/uuid [:uuid "A uuid to identify the person" :db.unique/identity :required]
          :name [[:interface.person/name] "A person's names" :gen/should-generate]}
 :interface.def/identify-via [['?e :person.id/uuid]]}

{:interface.def/name :interface.person/name
 :interface.def/fields
 #:person.name{:first [:string "First name" :gen/should-generate]
               :last [:string "Last name" :gen/should-generate]}
 :interface.def/identify-via [(or ['?e :person.name/first]
                                  ['?e :person.name/last])]}

A call to generate the pull would look like:

(gen-pull ast :interface.person)

;; result 👇

[:person.id/uuid
 {:person/name [:person.name/first
                :person.name/last]}]