show_available_catalogues: Helper function for download_abs_data_cube to show the available catalogues.
Description
This function lists the possible catalogues that are available on the ABS website.
These catalogues must be specified as a string as an argument to download_abs_data_cube.
optional character string specifying the heading on the ABS statistics webpage.
e.g. "Earnings and work hours"
refresh
logical; `FALSE` by default. If `FALSE`, an internal table of the available ABS catalogues is used. If `TRUE`, this table is refreshed from the ABS website.