The `whack` and `stab` animation types look identical when holding a crossbow in first person mode

Commands for reproduction:

/swing @s mainhand stab
/swing @s mainhand whack

For almost all other items, “stab” and “whack” are visibly different. When holding a crossbow, however, the animation is the same for both of them for some reason. I think this is wrong.

This may be fixable by introducing a third option for “swing” which is specifically only used for when punching when holding a crossbow.