machine linking refactor to ecs (#4323)

* started work

* some more work, ui working (somewhat)

* stuff

* reorganization

* some more reorg

* conveyors

* conveyors working

* finalized (dis)connection
added linkattempt
added feedback text
work on conveyors

* removed command
add rangecheck

* fixed inrange check

* handling

* ui no longer kanser, ship it

* adresses reviews

* reformats file

* reformats file

Co-authored-by: Paul <ritter.paul1+git@googlemail.com>

Content.Server/MachineLinking/System/SignalButtonSystem.cs

@@ -0,0 +1,23 @@
+using Content.Server.MachineLinking.Components;
+using Content.Server.MachineLinking.Events;
+using Content.Shared.Interaction;
+using Robust.Shared.GameObjects;
+
+namespace Content.Server.MachineLinking.System
+{
+    public class SignalButtonSystem : EntitySystem
+    {
+        public override void Initialize()
+        {
+            base.Initialize();
+
+            SubscribeLocalEvent<SignalButtonComponent, InteractHandEvent>(OnInteractHand);
+        }
+
+        private void OnInteractHand(EntityUid uid, SignalButtonComponent component, InteractHandEvent args)
+        {
+            RaiseLocalEvent(uid, new InvokePortEvent("pressed"), false);
+            args.Handled = true;
+        }
+    }
+}