Add file_cleaner.py, clean_me.txt, and task instructions.
Add overwrite function that takes in a filename and cleans it of whitespace
Add rewrite function that takes in a filename, creates a copy file and cleans it of whitespace.
Add main block to confirm user interactions and call functions if desired.
Add text with whitespace to clean_me file for testing.
Add rewrite function testing file and reset whitespace on overwrite function test file.