Add terminal

[toddwilkerson]

Issue #, if available:

Description of changes: Added code to query for activity in terminals, prevent shutdown if terminal is not idle.

Testing Done

• [X] Notebook Instance created successfully with the Lifecycle Configuration

• [X] Notebook Instance stopped and started successfully

• [NA] Documentation in the script around any network access requirements

• [NA] Documentation in the script around any IAM permission requirements

• [X] CLI commands used to validate functionality on the instance

• [NA] New script link and description added to README.md

• Two terminals open.

• root crontab entry, run every minute for testing, look for idleness of 60 seconds.

  */1 * * * * /home/ec2-user/anaconda3/bin/python3 /tmp/autostop.py --time 60 --ignore-connections>> /var/log/jupyter.log

• Type random commands in terminals, then wait a few minutes.

• /var/log/jupyter.log contents:

  Notebook is idle. Last activity time =  2023-04-07 15:27:02.004000
  Terminal 1 is not idle. Last activity time =  2023-04-07 15:34:06.549102
  Terminal 2 is not idle. Last activity time =  2023-04-07 15:35:01.070414
  Notebook not idle. Pass.
  Notebook is idle. Last activity time =  2023-04-07 15:27:02.004000
  Terminal 1 is not idle. Last activity time =  2023-04-07 15:35:03.711165
  Terminal 2 is idle. Last activity time =  2023-04-07 15:35:01.070414
  Notebook not idle. Pass.
  Notebook is idle. Last activity time =  2023-04-07 15:27:02.004000
  Terminal 1 is not idle. Last activity time =  2023-04-07 15:36:03.047135
  Terminal 2 is idle. Last activity time =  2023-04-07 15:35:01.070414
  Notebook not idle. Pass.
  Notebook is idle. Last activity time =  2023-04-07 15:27:02.004000
  Terminal 1 is idle. Last activity time =  2023-04-07 15:37:02.624094
  Terminal 2 is idle. Last activity time =  2023-04-07 15:35:01.070414
  Closing idle notebook

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