Rework job food/alchohol benefits into livers (#55721)

By moving the "special behaviour" of something like security officers
eating donuts, or engineers losing radiation by drinking Screwdrivers,
into traits on the liver, this makes the "origin" of that behaviour more
clearly defined, rather than something that's attached to the mind of
the person. (For example, now if a wizard mindswaps into a Security
Officer, they too can now digest donuts good.)

Having this behaviour be partially visible to the more medically
inclined members of the station (like doctors, and the chaplain for
"entrails reading mystic" themes), means that a dismembered liver tells
a story to those who know how to read it.

Some jobs have more "benefits" than others, for example the only thing
that the liver of a Quartermaster gives them is a sense of inadequacy
when consuming royal carpet.

Clowns having livers that honk make them easier to identify, and plays
into the retconned "bike horns are clown livers lore"? Also, why not cut
out a clown's liver then honk them with it? You monster.

code/modules/library/skill_learning/skillchip.dm

@@ -424,3 +424,12 @@
 	skill_icon = "save"
 	activate_message = "<span class='notice'>You feel your mind automatically verifying long serial numbers on disk shaped objects.</span>"
 	deactivate_message = "<span class='notice'>The innate recognition of absurdly long disk-related serial numbers fades from your mind.</span>"
+
+/obj/item/skillchip/entrails_reader
+	name = "3NTR41LS skillchip"
+	auto_traits = list(TRAIT_ENTRAILS_READER)
+	skill_name = "Entrails Reader"
+	skill_description = "Be able to learn about a person's life, by looking at their internal organs. Not to be confused with looking into the future."
+	skill_icon = "lungs"
+	activate_message = "<span class='notice'>You feel that you know a lot about interpreting organs.</span>"
+	deactivate_message = "<span class='notice'>Knowledge of liver damage, heart strain and lung scars fades from your mind.</span>"