Create GitHub action to pull and update CodeGuard Rules within repo #22
Description
Many users copy the rules from this repo’s Releases into their own repo, but those files quickly get out of date. Please add an official GitHub Action that (1) installs the rules if they aren’t present and (2) checks whether the latest Release version differs from the version currently in the repo (stored in a simple version marker file). If a newer release exists, the action should download the matching release asset, update the rules directory, and open/update a PR.