Why should `BiobjectiveNondominatedSortedList` be a subclass of `MOArchiveBase`?

<img width="756" height="565" alt="Image" src="https://github.com/user-attachments/assets/958d3f85-5c93-46ae-9e20-bca66c26d9f9" />

providing in particular `weights` and `ideal_point`,  see also [`MOArchiveBase`](https://github.com/naceee/moarchiving/blob/4ddcf07664383af5d631e85eab054c8113fc4275/moarchiving/moarchiving_base.py#L13)