[Feature request]: Add missing case labels in switch statements

[vasiltabakov]

public class Main {

    public enum Numbers {
        One, Two, Three, Four, Five;
    }

    public void testing() {
        Numbers n = Numbers.One;

        switch(n) {
            case Two:
            return;
        }
    }
}

The LS would show messages about missing case labels, but does not offer a code action to automatically add them all.

It would be great to have such a code action.