**Feature or enhancement** Add FreeBSD build and test using Cirrus-CI (for pull requests) **Pitch** Cirrus-CI is a hosted CI service that supports FreeBSD, Linux, macOS, and Winodws. Add a .cirrus.yml to provide CI coverage on pull requests for FreeBSD 12.3 and 13.0. Adding a .cirrus.yml to build + test on FreeBSD will add coverage for pull requests. (The Cirrus-CI application would need to be enabled on the cpython repo.) Here is an example run from my fork: https://cirrus-ci.com/build/5512210465161216 **Previous discussion** <!-- gh-linked-prs --> ### Linked PRs * gh-91961 * gh-108972 * gh-108993 * gh-108999 * gh-109010 * gh-109011 * gh-109127 * gh-109457 * gh-113938 <!-- /gh-linked-prs -->