calc_table_maxes(
headers,t) ->maxes
Calculate maximum display widths for each column in a table
Returns a table mapping column index (1-based) to the maximum display
width of any cell in that column, including the header. Uses
utf.display_len for correct handling of wide characters (CJK, emoji).
headers is an array of header definition strings (see
parse_pipe_table_header). t is an array of rows, each row being an
array of cell values.