* pacman: add stdout and stderr as return parameters
Following the model of ansible.builtin.apt
* Bugfix to PR: fix documentation formatting
* Add changelog fragment 3758-pacman-add-stdout-stderr.yml
* Apply suggestions from code review
* Update changelogs/fragments/3758-pacman-add-stdout-stderr.yml
Co-authored-by: Felix Fontein <felix@fontein.de>