Reference resolution from values to declarations.

[cjllanwarne]

Works on values that were part of a declaration. Doesn't currently work on task calls but that should be possible to add. Also doesn't reverse this via Find usages yet but again, this is a building block in the direction

Eg. using CMD+B on the morning value would bring us to the Boolean morning = true declaration.

workflow wf {
  Boolean morning = true
  String greeting = "good " + if morning then "morning" else "afternoon"
  call hello {
    input: s = greeting
  }
}

[kshakir]

LGTM!