User Input

We've hardcoded the prompt that goes to Gemini, which is... not very useful. Let's update our code to accept the prompt as a command-line argument.

We don't want our users to have to edit the code to change the prompt!

Assignment

We'll use Python's built-in argparse module to handle command-line arguments. Start by importing that.
The way argparse works is that we create a parser object, define the arguments we want to accept, and then parse whatever arguments the user actually provided when they ran the script. See the example code below; you may want to customize the description, argument name, help message, etc. But the idea is that we're telling the argument parser to expect a single positional argument, i.e., the user-provided prompt.
```
parser = argparse.ArgumentParser(description="Chatbot")
parser.add_argument("user_prompt", type=str, help="User prompt")
args = parser.parse_args()
# Now we can access `args.user_prompt`
```
Update your call to Gemini so that contents is set to the user's prompt.

Try running your script again while passing an argument, e.g.,

uv run main.py "Why are episodes 7-9 so much worse than 1-6? Use one paragraph."

Also try running the script without an argument. Notice that argparse automatically halts the script and prints a helpful error message (with an exit code of 2).

The remainder of the script can remain unchanged for now.

If things seem to be working correctly, run and submit the CLI tests.