* update Tikhonov.get_operators_regularizer() docstring

* add CI badge to README

* posterior() method for Tikhonov solvers

* update lstsq test structure

* update posterior lstsq docs, error if deterministic

* update roms for bayesian compatibility

* update README, Makefile, remove extra logo file

* update lstsq, rom docstrings

* OperatorPosterior and BayesianROM classes

* version 0.5.12 -> 0.5.13

* literature update early 2025