Hpaneru/jira_work_logger — reverse-engineered prompt

Build me a small Python command line tool that lets me add a worklog to Jira without opening the Jira website. I want to run one command with a ticket key, a start time, an end time, and a short description. The tool should calculate how much time that is, format the start time correctly for Jira, and send it as a Jira worklog using my Jira site, email, and API token from a .env file.

Please make it use the Australia Sydney timezone automatically, accept times in 24 hour HH:MM format, and show a helpful message when I run the help command. Include a sample .env file and a simple requirements file so I can install it easily. Keep it straightforward and beginner friendly, with clear errors if credentials or inputs are missing. Look up the current Jira worklog API docs if you need to.