Re-organize all projects (#4166)

Content.Server/Destructible/DestructibleThresholdReachedMessage.cs

@@ -0,0 +1,18 @@
+using Content.Server.Destructible.Thresholds;
+using Robust.Shared.GameObjects;
+
+namespace Content.Server.Destructible
+{
+    public class DestructibleThresholdReachedMessage : ComponentMessage
+    {
+        public DestructibleThresholdReachedMessage(DestructibleComponent parent, Threshold threshold)
+        {
+            Parent = parent;
+            Threshold = threshold;
+        }
+
+        public DestructibleComponent Parent { get; }
+
+        public Threshold Threshold { get; }
+    }
+}