Update docs

[kylegach]

What Changed

• Improve clarity & structure of README
• In each rule's doc, change "Categories: ..." -> "Included in these configurations: ..."
  • Update generator util

Checklist

Check the ones applicable to your change:

• [x] Ran yarn update-all
• [ ] Tests are updated
• [x] Documentation is updated

Change Type

Indicate the type of change your pull request is:

• [ ] maintenance
• [x] documentation
• [ ] patch
• [ ] minor
• [ ] major

[kylegach]

@yannbf — This is just an attempt at improving. Feel free to modify however you see fit!

[yannbf]

Thanks a lot @kylegach <3 I worked on simplifying the usage of this eslint rule and also updated the README

[github-actions[bot]]

:rocket: PR was released in v0.3.0 :rocket: