Increasing test coverage of RSS part

[QuantumChemist]

Currently, the coverage looks like this: https://github.com/QuantumChemist/autoplex/actions/runs/10303233387/job/28522877796

Among this, the least covered code parts are:

autoplex/data/rss/flows.py                     43     43     0%   3-354
autoplex/data/rss/utils.py                    247    205    17%   31-41, 46-79, 120-136, 140, 144-157, 167-201, 208-225, 229-235, 239-256, 287-418, 446

I would like to suggest @YuanbinLiu and I work on increasing the test coverage.

[JaGeo]

I agree that this would be a very good idea. This would ensure that future implementations are safe and we might discover some additional bugs in the current implementation!

[YuanbinLiu]

Yes, this is a good idea