[DDW-604] Exports shade generation minor utility function in addition to createShades
[DDW-604] Exports shade generation minor utility function in addition to createShades

input-output-hk/daedalus,input-output-hk/daedalus,input-output-hk/daedalus,input-output-hk/daedalus,input-output-hk/daedalus,input-output-hk/daedalus