Turn array of objects into map using jq

jq.md

Given:

[{id: "1234", name: "foo"}, {id: "5678", name: "bar"}, ... ]

jq: map( { (."id"): (.) }) | add

Produces:

{
  "1234": { id: "1234", name: "foo" },
  "5678": { id" "5678", name: "bar" }
}