Add Flowbite Components verification

[andyw8]

Adds substancelab/flowbite-components as a verification target. Includes its RuboCop configuration, generated expected offenses, and ignores the downloaded source directory.

[andyw8]

cc @koppen in case you might be interested in adding this as a check your gem.

[koppen]

Interesting... we're not exactly following best practices, though 🙈

[andyw8]

You actually are in most places, the only things the linting picked up on were the missing -Component extensions and some methods which could be private.

You get full marks for the rest:

• ViewComponent/NoGlobalState - Prevent direct access to params, request, session, etc.
• ViewComponent/PreferSlots - Detect HTML parameters that should be slots
• ViewComponent/PreferComposition - Avoid inheriting one ViewComponent from another (prefer composition)
• ViewComponent/TestRenderedOutput - Encourage testing rendered output over private methods
• ViewComponent/MissingPreview - Ensure every ViewComponent has a corresponding preview file

[andyw8]

Actually, there are a couple of bugs this has highlighted. Looking into...

[koppen]

substancelab/flowbite-components#142 😎

[koppen]

Actually, there are a couple of bugs this has highlighted. Look into...

I am happy to provide some edge cases for you to battle 😆