Add meta.fixable property to each rule

[ybiquitous]

What is the problem you're trying to solve?

Similar discussion: #5842

If each rule would have metadata about autofixable or not, I think it would be useful for the following cases:

• the built-in verbose formatter could suggest autofixable rules if the rules errors are found
• custom formatters could make the Stylelint report more rich

What solution would you like to see?

It just adds the autofixable boolean property to the RuleMeta type as below:

stylelint/types/stylelint/index.d.ts

Lines 163 to 166 in 23dfa32

	export type RuleMeta = {
	url: string;
	deprecated?: boolean;
	};

export type RuleMeta = {
	url: string;
	deprecated?: boolean;
+	autofixable?: boolean;
};

Perhaps, the name autofixable may be debatable (fixable is better?). Please give me feedback, if any.

[JounQin]

https://eslint.org/docs/developer-guide/working-with-rules#rule-basics

fixable (string) is either "code" or "whitespace" if the --fix option on the command line automatically fixes problems reported by the rule

Important: the fixable property is mandatory for fixable rules. If this property isn't specified, ESLint will throw an error whenever the rule attempts to produce a fix. Omit the fixable property if the rule is not fixable.

And also, hasSuggestions and report ({ suggest: [] }) are good to have.

[jeddy3]

fixable?: boolean;

SGTM. We aren't interested in whitespace anymore and we only use the auto fixable word in our docs, whereas the command itself is fix.