atlas

Cut a new Atlas CLI release. Use when asked to release Atlas, bump the release version, create or update CHANGELOG.md, document user-facing changes, validate the Go/Nix build, create the release commit, and push the branch so GitHub Actions can create the tag and release.

Design, implement, debug, or review Atlas Bitbucket Cloud pull request CLI behavior. Use when changing `atlas pr` commands, Bitbucket PR REST payloads, reviewer handling, PR diffs, branch checkout behavior, or gh-style PR command compatibility in this repository.