* add an option to validate optional arguments like in a vector. This can resolve some issues with separating positionals from vector arguments
* style: pre-commit.ci fixes
* add some updates to the book
* style: pre-commit.ci fixes
* fix some precommit issues
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>