Introducing the "copy-message" command

Thanks! Generally, broker production releases are delivered in Solace Cloud about a month after the self-managed brokers are released (we need a bit of time to integrate a new release into Solace Cloud). 10.0.0 was a preview release which won’t be in Solace Cloud, but 10.0.1 will be a production release planned for mid-June, which means the release should be available in Solace Cloud in mid to late July.