Fix being able to start pulling something while incapacitated. (#4240)

Content.Shared/Pulling/Events/StartPullAttemptEvent.cs

@@ -0,0 +1,19 @@
+using Robust.Shared.GameObjects;
+
+namespace Content.Shared.Pulling.Events
+{
+    /// <summary>
+    ///     Directed event raised on the puller to see if it can start pulling something.
+    /// </summary>
+    public class StartPullAttemptEvent : CancellableEntityEventArgs
+    {
+        public StartPullAttemptEvent(IEntity puller, IEntity pulled)
+        {
+            Puller = puller;
+            Pulled = pulled;
+        }
+
+        public IEntity Puller { get; }
+        public IEntity Pulled { get; }
+    }
+}