Rename and clean up interaction events (#4044)

* Rename and clean up interaction events

* Fix hand equip events

Content.Shared/GameObjects/EntitySystemMessages/DragDropRequestEvent.cs

@@ -0,0 +1,37 @@
+#nullable enable
+using System;
+using Robust.Shared.GameObjects;
+using Robust.Shared.Map;
+using Robust.Shared.Serialization;
+
+namespace Content.Shared.GameObjects.EntitySystemMessages
+{
+    /// <summary>
+    /// Requests a drag / drop interaction to be performed
+    /// </summary>
+    [Serializable, NetSerializable]
+    public class DragDropRequestEvent : EntityEventArgs
+    {
+        /// <summary>
+        ///     Location that the entity was dropped.
+        /// </summary>
+        public EntityCoordinates DropLocation { get; }
+
+        /// <summary>
+        ///     Entity that was dragged and dropped.
+        /// </summary>
+        public EntityUid Dropped { get; }
+
+        /// <summary>
+        ///     Entity that was drag dropped on.
+        /// </summary>
+        public EntityUid Target { get; }
+
+        public DragDropRequestEvent(EntityCoordinates dropLocation, EntityUid dropped, EntityUid target)
+        {
+            DropLocation = dropLocation;
+            Dropped = dropped;
+            Target = target;
+        }
+    }
+}