Cancel projectile events on hit.

Through procedures, you can use the action result "pass" or "cancel" to make projectile events "on hitting a block" or "on hitting an entity" cause the projectile to simply pass through that entity or block in question. Specifically, when hitting an entity, it would be perfect to be able to use “cancel” so that it simply passes through the entity as if it had never hit it, or “pass” so that it passes through the entity, but still dealing the corresponding damage.