Added cli

[niekdomi]

This pr adds a lint command to the cli. There's a flag -u or --unique to filter duplicates. If a spelling mistake occurs, it will exit with a non zero status code. This makes it suitable for CI.

I'll iterate over the code in the next couple days, been a long day...

Anyways, here's an example of the cli:

Things to be done:

• cleanup, likely needed
• iterate over the directories in parallel? It's already fast and parallelism would add some complexity
• Use different log level, INFO isn't appropriate for cli
• test cases?
• docstrings
• anything else?

[niekdomi]

disclaimer: I'm not sure how the ansi codes behave on windows