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/Events/SignalReceivedEvent.cs

@@ -0,0 +1,16 @@
+using Robust.Shared.GameObjects;
+
+namespace Content.Server.MachineLinking.Events
+{
+    public class SignalReceivedEvent : EntityEventArgs
+    {
+        public readonly string Port;
+        public readonly object? Value;
+
+        public SignalReceivedEvent(string port, object? value)
+        {
+            Port = port;
+            Value = value;
+        }
+    }
+}