pyproject.toml

test_pln_full and tests for only plnpca inside test_plnpca

sone setters properly.

all. Need to change the elbos and the poiss_reg to handle the case where
covariates is None (no covariates is given).

pytest.

another init

now.

give a str and a pd.DataFrame.

and normalized the output of the elbos.