Basic gibbing (#2973)

* Adds gibbing

* Adds adminbused absurd-damage foamblade

* Sane parts

* BaseOrgan -> BaseMechanism

* Do not do random offset on shared, fix killing oneself with click attacks

* BaseMechanism -> BaseHumanOrgan -> *stuff*

* Account for prediction, again

* Add gibbing sound

Content.Server/GameObjects/Components/Destructible/Thresholds/Behavior/GibBehavior.cs

@@ -0,0 +1,27 @@
+using Content.Server.GameObjects.EntitySystems;
+using Content.Shared.GameObjects.Components.Body;
+using JetBrains.Annotations;
+using Robust.Shared.Interfaces.GameObjects;
+using Robust.Shared.Serialization;
+
+namespace Content.Server.GameObjects.Components.Destructible.Thresholds.Behavior
+{
+    [UsedImplicitly]
+    public class GibBehavior : IThresholdBehavior
+    {
+        private bool _recursive = true;
+
+        public void ExposeData(ObjectSerializer serializer)
+        {
+            serializer.DataField(ref _recursive, "recursive", true);
+        }
+
+        public void Trigger(IEntity owner, DestructibleSystem system)
+        {
+            if (owner.TryGetComponent(out IBody body))
+            {
+                body.Gib(_recursive);
+            }
+        }
+    }
+}