Re-organize all projects (#4166)

Content.Shared/Disposal/SharedDisposalUnitSystem.cs

@@ -0,0 +1,24 @@
+#nullable enable
+using Content.Shared.Disposal.Components;
+using JetBrains.Annotations;
+using Robust.Shared.GameObjects;
+
+namespace Content.Shared.Disposal
+{
+    [UsedImplicitly]
+    public sealed class SharedDisposalUnitSystem : EntitySystem
+    {
+        public override void Update(float frameTime)
+        {
+            foreach (var comp in ComponentManager.EntityQuery<SharedDisposalUnitComponent>(true))
+            {
+                comp.Update(frameTime);
+            }
+
+            foreach (var comp in ComponentManager.EntityQuery<SharedDisposalMailingUnitComponent>(true))
+            {
+                comp.Update(frameTime);
+            }
+        }
+    }
+}