Add run(Ref, TurnAction) convenience proc

Developers shouldn't need to work with Facets directly.

src/syndicate/actors.nim

@@ -448,6 +448,10 @@ proc run*(facet; action: TurnAction; zombieTurn = false) =
     action(turn)
     run(turn.queues)
 
+proc run*(`ref`: Ref; action: TurnAction) =
+  ## Convenience proc to run a `TurnAction` in the scope of a `Ref`.
+  run(`ref`.relay, action)
+
 proc stop*(turn: var Turn, facet: Facet) =
   enqueue(turn, facet.parent.get) do (turn: var Turn):
     facet.terminate(turn, true)