Nobody can tell online if the fork is repairable for sure, and certainly not whether it's worth what a framebuilder might charge, but I'm fairly confident you are ill-advised to try, given the state of the fork crown. A chrome 700c replacement fork will probably cost about the same as alignment by a framebuilder. Both would require a headset overhaul, but the original would also require some touchup or a repaint, as the paint will peel when the fork is straightened.