Console operation selection menu

Implement a Python program that:

• displays a list of available commands with their numbers;
• prompts the user to enter the number of the chosen command;
• performs the corresponding action based on the entered number (the actual logic can be replaced with simple print statements). Example menu:

Choose a command:

1. Show list of users
2. Add a new user
3. Delete a user
4. Exit

Enter the command number:

After input, the program should perform the action corresponding to the selected item.