As a light version of #70, it would be also extremely useful if we, as users, just match our queries against the indexes and get the following output:

query	length	ref1	ref2	ref3
q1	3876	3301	207	1029
q2	100	0	0	0
q3	1	1	0	1

I.e., query name, its length, and the number of matching k-mers to each ref.

This would be done only if request via st like --format matrix, so it wouldn't impact benchmarking for papers, etc.

(Side note: I'm aware that for very large databases this is not a great format. However, many applications use Fulgor on small instances only, and there such an output would be super relevant.)