docs: add XML documentation to PepperDash.Core project

Co-authored-by: andrew-welker <1765622+andrew-welker@users.noreply.github.com>

src/PepperDash.Core/Comm/CommunicationGather.cs

@@ -88,6 +88,9 @@ namespace PepperDash.Core
 		/// Disconnects this gather from the Port's TextReceived event. This will not fire LineReceived
 		/// after the this call.
 		/// </summary>
+  /// <summary>
+  /// Stop method
+  /// </summary>
 		public void Stop()
 		{
 			Port.TextReceived -= Port_TextReceived;