Add helper for formatting long warning messages

[otekraden]

I solved Issue #2559 by creation the function "format_message_to_asterisk_box", that formatting message to asterisk box representation.

It takes this args: message (str): The message to format. title (str, optional): The title of the box. Defaults to None. width (int, optional): The width of the box. Defaults to 80. border_char (str, optional): The character to use for the border. Defaults to "*". padding (int, optional): The number of spaces to pad the border. Defaults to 2.

Also I added tests for it. Function it seems working good.

But I was not sure in what file to put function. Now its location and tests by this paths: src/briefcase/utils.py tests/test_utils.py

It is my very first attempt of contribution. Please don beat me hard)

I am waiting for your feedback.

PR Checklist:

• [x] All new features have been tested
• [x] All new features have been documented
• [x] I have read the CONTRIBUTING.md file
• [x] I will abide by the code of conduct