tax_info convenience function?

[david-barnett]

Plan:

tax_info(ps, tax_names = NA, tax_select = NA, tibble = NA, ranks = FALSE, undetected = 0)

provide either

• tax_names, 1 or vector
• tax_select, 1 or vector for tax_select regex interface (default of 1 typo probably fine)

returns:

• (some) ranks
• prev (using prev_calc, respecting undetected arg)
• min, mean, max etc.?

return format (for tibble = NA):

• if one taxon, cat (unless tibble = TRUE)
• if multiple, return tbl, unless tibble = FALSE