Re-organize all projects (#4166)

Content.Shared/Body/Mechanism/MechanismSystem.cs

@@ -0,0 +1,20 @@
+#nullable enable
+using JetBrains.Annotations;
+using Robust.Shared.GameObjects;
+
+namespace Content.Shared.Body.Mechanism
+{
+    [UsedImplicitly]
+    public class MechanismSystem : EntitySystem
+    {
+        public override void Update(float frameTime)
+        {
+            base.Update(frameTime);
+
+            foreach (var mechanism in ComponentManager.EntityQuery<IMechanism>(true))
+            {
+                mechanism.Update(frameTime);
+            }
+        }
+    }
+}