Add new source for ANC ephemeris data

Currently goes into generic product which only parse OBT times not UTC maybe some other stuff too the `QLFlareFlag` has some coordinate stuff that could be used


```
from stixpy.product import Product

anc = Product("https://pub099.cs.technik.fhnw.ch/fits/ANC/2024/03/03/ASP/solo_ANC_stix-asp-ephemeris_20240303_V02.fits")
```