Add haloperidol, potassium iodide (#27454)

* add haloperidol, potassium iodide

* review fixes

* review and tuning

* shader review

* use timespan and AutoPausedField

Content.Shared/Drowsiness/DrowsinessSystem.cs

@@ -0,0 +1,9 @@
+using Content.Shared.StatusEffect;
+
+namespace Content.Shared.Drowsiness;
+
+public abstract class SharedDrowsinessSystem : EntitySystem
+{
+    [ValidatePrototypeId<StatusEffectPrototype>]
+    public const string DrowsinessKey = "Drowsiness";
+}