Splits head dmi into separate files for both mob and obj icons. Kept similar to suit split categorization + some more. New files include beanie, bio, chaplain, costume, cowboy, default, hats(softcaps, fedoras, head caps, generic hats), helmet(helmets and other armored headgear/hoods), spacehelm, utility(hardhats, mostly work related hats), wizard.
Moves animal/pet head sitting icons to 1 folder, pets_head.dmi
Renames PAI head sitting icon file to pai_head.dmi
Loosely adapted from /vg/. This is an entity component system for adding behaviours to datums when inheritance doesn't quite cut it. By using signals and events instead of direct inheritance, you can inject behaviours without hacky overloads. It requires a different method of thinking, but is not hard to use correctly. If a behaviour can have application across more than one thing. Make it generic, make it a component. Atom/mob/obj event? Give it a signal, and forward it's arguments with a SendSignal() call. Now every component that want's to can also know about this happening.
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