Remove IInteractHand (#7601)

* Plantholder

* Strap

* Finish him

* Mirror review stuff

Content.Shared/Interaction/InteractHand.cs

@@ -0,0 +1,39 @@
+using JetBrains.Annotations;
+
+namespace Content.Shared.Interaction
+{
+    public sealed class InteractHandEventArgs : EventArgs, ITargetedInteractEventArgs
+    {
+        public InteractHandEventArgs(EntityUid user, EntityUid target)
+        {
+            User = user;
+            Target = target;
+        }
+
+        public EntityUid User { get; }
+        public EntityUid Target { get; }
+    }
+
+    /// <summary>
+    ///     Raised directed on a target entity when it is interacted with by a user with an empty hand.
+    /// </summary>
+    [PublicAPI]
+    public sealed class InteractHandEvent : HandledEntityEventArgs, ITargetedInteractEventArgs
+    {
+        /// <summary>
+        ///     Entity that triggered the interaction.
+        /// </summary>
+        public EntityUid User { get; }
+
+        /// <summary>
+        ///     Entity that was interacted on.
+        /// </summary>
+        public EntityUid Target { get; }
+
+        public InteractHandEvent(EntityUid user, EntityUid target)
+        {
+            User = user;
+            Target = target;
+        }
+    }
+}