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/StartPullAttemptEvent.cs

@@ -0,0 +1,17 @@
+namespace Content.Shared.Pulling.Events
+{
+    /// <summary>
+    ///     Directed event raised on the puller to see if it can start pulling something.
+    /// </summary>
+    public sealed class StartPullAttemptEvent : CancellableEntityEventArgs
+    {
+        public StartPullAttemptEvent(EntityUid puller, EntityUid pulled)
+        {
+            Puller = puller;
+            Pulled = pulled;
+        }
+
+        public EntityUid Puller { get; }
+        public EntityUid Pulled { get; }
+    }
+}