rseng-version-control-review

Covers using version control effectively for research software and the PR-time review process: choosing a VCS, branching and commit practice, authorship and signatures in commit metadata (author/committer identity, Co-authored-by trailers, signed commits and tags, .mailmap), collaboration on GitHub/GitLab, and constructive checklist-driven pull-request reviews. Use when the user asks how to set up git, design a…