Add option to exclude directories or files explicitly

[debuiteb]

Provide an option to explicitly exclude certain directories or files.

For example, with the structure:

project
|    README.md
|    somefile.txt
|___ first-dir
     |    file-to-check.txt    
     |    other-typo-file.txt
     |
     |___ exclude-dir
          | ...

If I want to search for typos in all the files in first-dir except for anything in exlude-dir, I would like to do something like
topy --exclude exclude-dir root-dir

Could this option be added to provide a little more flexibility with the tool? Thanks

[debuiteb]

I love the tool and I'd be delighted to try and implement this feature!