Pulling rework (#20906)

* Pulling rework

Fixing up the FOUR systems managing pulling, all the shitcode, and also making it nicer ingame.

* More pulling cleanup

* stats

* More cleanup

* First draft

* More pulling

* weh

* Fix puller

* Pulling working

* Fix merge

* Dunked

* Self-merge time

Content.Shared/Movement/Pulling/Events/PullMessage.cs

@@ -0,0 +1,13 @@
+namespace Content.Shared.Movement.Pulling.Events;
+
+public abstract class PullMessage : EntityEventArgs
+{
+    public readonly EntityUid PullerUid;
+    public readonly EntityUid PulledUid;
+
+    protected PullMessage(EntityUid pullerUid, EntityUid pulledUid)
+    {
+        PullerUid = pullerUid;
+        PulledUid = pulledUid;
+    }
+}