Should generate helpers for C#

[ralfbiedert]

Single field #[repr(C)] structs containing integer fields should generate these helpers:

    public partial struct InstanceID : IComparable<InstanceID>, IEquatable<InstanceID>
    {
        public static InstanceID From(int id)
        {
            return new InstanceID { x0 = (ulong)id };
        }

        public int CompareTo(InstanceID other)
        {
            return x0.CompareTo(other.x0);
        }

        public override string ToString()
        {
            return x0.ToString();
        }

        public override int GetHashCode()
        {
            return x0.GetHashCode();
        }

        public bool Equals(InstanceID other)
        {
            return x0 == other.x0;
        }
    }