Respond in thread #6

For some commands, especially any that may output a large amount of text, responding to the message in thread, instead of in the main channel might be a better experience.

• Create a function that determines where to send the response based on the event so it can be reused.
  • If the message came from a thread, respond in that thread.
  • If the message did not come from a thread, respond in the thread for that message.
• Apply this to the ping and jobs commands.