Support passing rewriters to CLI

[sl4vr]

What is the purpose of this pull request?

Support passing rewriters to CLI - #42

What changes did you make? (overview)

--list-rewriters and --rewrite options for nextify command.

Is there anything you'd like reviewers to focus on?

I didn't dig into that, just supposed rewriters gonna rewrite. Also it just failed for me in other case.

Also this implementation requires --edge and --proposed flags to use and even list corresponding rewriters. If it's not supposed to be so, I can change that.

Checklist

• I've added tests for this change
• I've added a Changelog entry
• I've updated a documentation/SUPPORTED_FEATURES.md

[palkan]

Thanks for the PR! I will take a look later this week.

[palkan]

Great job 👍 Thank you!

Could you please add a change log entry?

[sl4vr]

Thank you! I've just added change log entry.

[palkan]

👍
Could you please also add the actual link to the bottom of this file? (Right now it's not working, cause shortcut is not defined)

[sl4vr]

Oops I thought it's Github feature or something 🙄

[palkan]

Thanks a lot!
Awesome work 👍

Marked task as done: https://cultofmartians.com/tasks/ruby-next-cli-rewriters.html#task (check if everything is correct).

And could you please send me your mailing address to my e-mail (should be on my GitHub profile), so we'll we able to send you some stuff someday)