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.Server/Chemistry/ReagentEffectConditions/ReagentThreshold.cs

@@ -0,0 +1,26 @@
+using Content.Shared.Body.Components;
+using Content.Shared.Chemistry.Reagent;
+using Content.Shared.Chemistry.Solution;
+using Robust.Shared.GameObjects;
+using Robust.Shared.Serialization.Manager.Attributes;
+
+namespace Content.Server.Chemistry.ReagentEffectConditions
+{
+    /// <summary>
+    ///     Used for implementing reagent effects that require a certain amount of reagent before it should be applied.
+    ///     For instance, overdoses.
+    /// </summary>
+    public class ReagentThreshold : ReagentEffectCondition
+    {
+        [DataField("min")]
+        public ReagentUnit Min = ReagentUnit.Zero;
+
+        [DataField("max")]
+        public ReagentUnit Max = ReagentUnit.MaxValue;
+
+        public override bool Condition(IEntity solutionEntity, Solution.ReagentQuantity reagent)
+        {
+            return reagent.Quantity >= Min && reagent.Quantity < Max;
+        }
+    }
+}