Normalize and Match City Names to NUTS Regions // Normalizes city names for EEA countries and matches them to NUTS 3 regions using provided crosswalks. Features include comprehensive normalization rules, cascading matching logic (Exact NUTS - Exact LAU - Fuzzy), and single-source data synthesis. The package implements the NUTS classification as described in the NUTS methodology (Eurostat (2021) https://ec.europa.eu/eurostat/web/nuts).