GitLab

* add v1 neftune

* use `unwrap_model` instead

* add test + docs

* Apply suggestions from code review
Co-authored-by: Zach Mueller <muellerzr@gmail.com>

* more details

* fixup

* Update docs/source/en/main_classes/trainer.md
Co-authored-by: amyeroberts <22614925+amyeroberts@users.noreply.github.com>

* refactor a bit

* more elaborated test

* fix unwrap issue

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Co-authored-by: Zach Mueller <muellerzr@gmail.com>
Co-authored-by: amyeroberts <22614925+amyeroberts@users.noreply.github.com>