USAGE: python3 script.py <image_file_path> [output_file_path] [brightness] [output_image]
Argument Validation: Validate the command-line input to ensure that the user provides the correct number of arguments and that the provided file path is valid.
Adjustable Brightness: Allows adjusting the brightness of the generated ASCII art by mapping pixel intensity to ASCII characters based on different ranges. RANGE [ .0 - 1 ]
Output to File: Allow saving the generated ASCII art to a text file instead of printing it to the console.
Function Documentation: Add docstrings to functions to describe what each function does.
Constants as Uppercase: Convert ASCII_CHARS to uppercase to indicate that it's a constant.
Error Handling: Improve error handling by catching specific exceptions. For instance, catch the FileNotFoundError and PermissionError to provide more informative error messages to the user.
Allow convert image from external url: Users can paste image's url with -l flag to convert image from the internet without saving it to local machine
DIY the ASCII_CHARS list: Create your unique ascii art by DIY the ASCII_CHARS,
Output to Image: Saves the generated ASCII art to a jpg file in the same directory as output.jpg. Use option -u/--output-image.
Made -p/--path a required CLI param.
Added option CLI param -s/--silhouette to output image as an ASCII silhouette. Defaults to False.
created class SimpleCmd which emulates command interpreter. => method ascii. takes all args passed to separated by space