Build realistic PyPSA input data. Triggers: atlite | cutouts | wind/solar capacity factors | renewable profiles | heat demand | heat pump COP time series | technology-data | cost assumptions | annuities | fuel price assumptions | gas price | EUA/carbon price assumptions | powerplantmatching | existing fleets | existing power plant data | ENTSO-E load | cross-border data | demand profiles | cost inputs | realistic numbers instead of placeholders.
