Changes in version 0.0.0.9000                      

  - Add set_sheet_list_names(), as_sheet_names(), and as_sheet_list()
    utility functions (based on existing openxlsx2 code). (2024-12-02)
  - Add prep_wb_data() function (see #4, 2024-12-02).
  - Add read_xlsx_ext(), write_xlsx_ext() (#3), and wb_add_data_ext()
    functions (2024-11-10).
  - Add set_excel_fmt_class() function.
  - Add wb_add_marquee_text() and fmt_marquee_txt() functions.
  - Add wb_add_styles() function for passing multiple styles in a list.
    Provide common_dxfs_styles as a prepared named list of styles.
    (2025-01-25)
  - Add as_data_validation_value() helper function. (2025-01-25)
  - Publish package to GitHub (2024-10-21).