Changes in version 2.0.1 (2026-04-10)                  

  - Replaced Excel import with standard RWL format support via
    import_rwl()
      - Deprecated TRW_readExcel() in favor of import_rwl()
      - Added firs_age_class parameter for flexible age_class filtering
      - Added zero_as_na parameter to handle zero values
      - Response to CRAN reviewer comments