Move do_afters to an overlay (#10463)

Content.Shared/DoAfter/SharedDoAfterComponent.cs

@@ -34,12 +34,20 @@ namespace Content.Shared.DoAfter
         }
     }
 
+    // TODO: Merge this with the actual DoAfter
     /// <summary>
     ///     We send a trimmed-down version of the DoAfter for the client for it to use.
     /// </summary>
     [Serializable, NetSerializable]
     public sealed class ClientDoAfter
     {
+        public bool Cancelled = false;
+
+        /// <summary>
+        /// Accrued time when cancelled.
+        /// </summary>
+        public float CancelledAccumulator;
+
         // To see what these do look at DoAfter and DoAfterEventArgs
         public byte ID { get; }
 
@@ -51,6 +59,8 @@ namespace Content.Shared.DoAfter
 
         public EntityUid? Target { get; }
 
+        public float Accumulator;
+
         public float Delay { get; }
 
         // TODO: The other ones need predicting