In this folder there is configuration for codecoverage, dependabot, and ci workflows that check the library more deeply than the default configurations.
This folder can be or was merged using a --allow-unrelated-histories merge strategy from https://github.com/jonhoo/rust-ci-conf/ which provides a reasonably sensible base for writing your own ci on. By using this strategy the history of the CI repo is included in your repo, and future updates to the CI can be merged later.
To perform this merge run:
git remote add ci https://github.com/jonhoo/rust-ci-conf.git
git fetch ci
git merge --allow-unrelated-histories ci/main
An overview of the files in this project is available at: https://www.youtube.com/watch?v=xUH-4y92jPg&t=491s, which contains some rationale for decisions and runs through an example of solving minimal version and OpenSSL issues.