CLI Tool Prompt Generator

I would like to add some additional specifications below.

- Add a help option using `argparse`. - Add docstrings and type hints. - Accept input files as arguments of the script without any option flag. - Output the text to stdout if there is no specified output filename. - Add an option to save the output to a file. - Add an option to specify the output filename. - Add an option to use a default output filename. - Use basename of the input file as the default output filename. - Suggest some potential filenames for the script. - Ask "(y)es/(n)o" before overwriting an existing file (default: no). - Add the following shebang:

```

#!/usr/bin/env python3

```