[Enhancement] Potential costs to equipping an identity

[IceCubeDragon]

Hello! I love this mod, you're doing good work! That being said, I'd like to suggest some potential additional config options for players who might want to shift the balancing/ potentially add more difficulty or things to manage with identities

For example, maybe changing identity could be configured to take up some hunger/saturation, automatically do some damage/inflict an effect, or require/use up a certain amount of exp for each switch, adding an additional cost to switching identities/potentially even make it possible to get stuck in an identity if resources aren't managed well

Also- we already have a maximum health limit, but it'd be nice if we also had a minimum health limit too so switching to smaller creatures doesn't have the issue of taking out most of the player's health

Thank you for your time!