add a root column on gtdb_classification.tsv
from
specI domain phylum class order family genus species full_lineage gtdb_release
specI_v4_01183 d__Bacteria p__Bacillota c__Bacilli o__Bacillales f__Anoxybacillaceae g__Parageobacillus s__Parageobacillus toebii
to
specI root domain phylum class order family genus species full_lineage gtdb_release
specI_v4_01183 r_root d__Bacteria p__Bacillota c__Bacilli o__Bacillales f__Anoxybacillaceae g__Parageobacillus s__Parageobacillus toebii