ts/lines-between-class-members: does not apply to interface members

[ygrandgirard]

Description

PR with failing test for issue #353.
The ts/lines-between-class-members rule does not apply to interface members.

Given this config:

{
  "rules": {
    "@stylistic/ts/lines-between-class-members": "error"
  }
}

This will be reported:

class A {
  a: string;
  b: string; // Expected blank line between class members.
}

But not this:

interface A {
  a: string;
  b: string;
}

Linked Issues

#353

Additional context

It does not look particularly difficult to fix (see ygrandgirard/eslint-stylistic@main...ygrandgirard:eslint-stylistic:bugfix/lines-between-interface-members) though I am not sure about the typing. If you are ok, I can create another PR with my fix.

[antfu]

I don't understand - the rule name is specifically mention it's for class-members - I don't think lint for interface making sense.

[ygrandgirard]

The way I see TypeScript interfaces is as syntactic sugar around abstract classes. Maybe I am wrong in doing so, I don't know how the compiler actually treats them. But still, it totally makes sense to me that this rule handles both.
However, I understand that my point of view may not be shared by everyone. If you think a separate rule should be better, I can open another PR for that instead!