Add acknowledgement responses when a command is being executed

[mmiller1]

something that might be cool is if gort could have a custom acknowledgement command when it is starting to execute a command in a bundle. larger container images that take time to pull on a fresh kubernetes node could leave a user questioning whether or not the command was recognized, which could lead to instances of commands being sent to gort multiple times, etc.

[theothertomelliott]

Great idea!

I could see a few ways we could do this:

• Post a message saying the command had been identified and was in progress, either immediately or after a delay of a few seconds without the command completing. This message could also be deleted after the command was complete.
• Post in a thread under the original message.
• Add a reaction to the original message. More platform specific, but both Slack and Discord support this.

[clockworksoul]

Do we want to call this one complete for now and create a new issue to refine it?

[mmiller1]

sure, sounds great. thanks!