Generic Sequence for any number type

[atifaziz]

I propose to add a generic version of Sequence for any number type:

public static IEnumerable<T> Sequence<T>(T start, T stop, T step)
    where T : INumber<T> =>
    Generate(start, n => n + step).TakeWhile(n => step >= T.Zero ? stop >= n : stop <= n);

It would address requests like #815 without having to maintain duplicate versions. However, using static abstract members means this will be available .NET 7+ onwards only. The fallback for other versions would still be to go with Generate.