--fix for explicit privacies in member-access

[JoshuaKGoldberg]

TypeScript code being linted

class Foo {
    member: number;
    constructor(member: number) {
        this.member = member;
    }
}

Many people coming from C# and friends assume class members to be private by default. That's not true in TypeScript. A rule that requires all constructs have an explicit privacy modifier would help a lot.

Auto-fixing logic should be easy: just add "public ".

[ajafff]

There is member-access that does what you want except auto-fixing.

[JoshuaKGoldberg]

:( oh. Whoops.

Retargeting for just auto-fixing... would you consider it valid to auto-fix to public? It would be nice to auto-detect the ability to be private or protected, but that would be a dangerous change and hard with exported constructs.

[ajafff]

Opened #2969 to automatically add public when fixing