Ability for MC_PRE/POST_PLAYER_ADD_HEARTS to call for non-red-heart damage as well

[MrHeadcrab2]

The callback currently returns a negative number when taking red heart damage, though doesn't call for any other heart types. It would be super useful to be able to use this callback's AddHealthType to tell what type of heart damage the player has taken A separate PRE_PLAYER_HEALTH_UPDATE might make more sense for this, though this callback is already close to doing that