Turn collision behavior of projectiles into hook

[szapp]

Instead of overwriting the memory for the collision behavior of projectiles on npcs attempt again to turn it into a hook.
This is safer as it will allow more control over when to apply which collision behavior. Simply overwriting the memory might not work in rare cases.

[szapp]

A hook does not work, as you cannot access the properties (material, shooter, target, ...). The current solution should be robust enough.