Keyboard (p.oxbow.0.1.1.doc.oxbow.runtime.Oxbow

val handle : 
  Ctx.manage Ctx.t ->
  Oxbow_state.Seat.t ->
  Oxbow_ipc.Command.Input.Keyboard.t ->
  (Yojson.Safe.t option, string) result

handle ctx seat cmd handles cmd.

Effects: mutates WM state