Metabolism refactor (#4395)

* metabolism -> respirator, add reageanteffect and reagenteffectcondition, start on metabolizercomp/system

* move LiverBehavior metabolism logic to Metabolizer

* minor tweaks and update all YAML

* how about actually taking conditions into account

* off by one

* removals

* reviews

Content.Shared/Chemistry/Reagent/ReagentEffectCondition.cs

@@ -0,0 +1,13 @@
+using Content.Shared.Body.Components;
+using Content.Shared.Chemistry.Solution;
+using Robust.Shared.GameObjects;
+using Robust.Shared.Serialization.Manager.Attributes;
+
+namespace Content.Shared.Chemistry.Reagent
+{
+    [ImplicitDataDefinitionForInheritors]
+    public abstract class ReagentEffectCondition
+    {
+        public abstract bool Condition(IEntity solutionEntity, Solution.Solution.ReagentQuantity reagent);
+    }
+}