This is a simple CLI tool with command-line argument support.

• Added greeting function: greet_user that returns a personalized greeting.
• Added command-line argument parsing using argparse.

Run the tool with optional arguments:

python main.py [--name NAME] [--verbose]

• --name, -n: Name to greet (default: 'World')
• --verbose, -v: Enable verbose output

python main.py
# Output: Hello World

python main.py --name Alice
# Output: Hello Alice

python main.py --name Bob --verbose
# Output:
# Verbose mode: Greeting Bob
# Hello Bob