Exclude/Ignore files option added.

[diogoocruz]

Added an option to ignore files listed on the pyproject.toml [tool.burocrata]["exclude"] as mentioned on this issue.
[2nd Commit] -> You can also ignore files by using --ignore "file1, file2, ..., fileN"

Relevant issues/PRs:

Issue: #7
" Add option to ignore files #7 "

[welcome]

💖 Thank you for opening your first pull request in this repository! 💖

A few things to keep in mind:

• Authorship Guidelines: Our rules for giving you credit for your contributions, including authorship on publications and Zenodo archives.
• Code of Conduct: How we expect people to interact in our projects.

⭐ No matter what, we are really grateful that you put in the effort to do this! ⭐

[leouieda]

@diogoocruz thank you for taking the time to implement this! It's much appreciated 🙂

I hadn't thought of adding the command line option but after trying it a bit and reading the explanation, I think I prefer to have it only as the pyproject.toml option. The main issue is that passing multiple file names (including globs) to an option is tricky and will end up being different from the syntax to pass multiple files as inputs. So I'd prefer to avoid having that extra source of confusion and have a single way to do it.

In hind sight, the --extension option should be the same: only available through the pyproject.toml as well. For projects, it would actually be easier. No matter what the project configuration is, running this tool is always burocrata FILES or burocrata FILES --check.

[leouieda]

Could be changed to always produce a valid exclude even if it's empty, like in get_gitignore. Then we don't need to check if exclude is defined when using it below.