GitLab

* fix deepcopy and copy

* add tests

* remove line

* ruff fix

* ruff

* Update tests/test_linear4bit.py
Co-authored-by: Aarni Koskela <akx@iki.fi>

* add missing state

* ruff format

* ignore formatting commit for git blame

* Params4bit should be initialized as frozen by default

* add test for serialization round-tripping

* add comparison capability for QuantSate

* add back accidentally remove line

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Co-authored-by: Aarni Koskela <akx@iki.fi>
Co-authored-by: Titus von Koeller <9048635+Titus-von-Koeller@users.noreply.github.com>