Add a swordfish weapon and make it enchantable.

Either a. make the current blue marlin a weapon and allow us to enchant it.

or b. add in a seperate swordfish and have that be a weapon.

It would be really cool to have a weapon from a peaceful source like fishing. The usual length measurements of fish could correspond to damage and weapon attack speed instead. This would allow players to own smaller and larger versions of the swordfish. It breaks up the monotony of having to get a spirit, shadow, or netherite weapon as the end goal.