Agent Skills: git-pull-request

Generates a polished Pull Request body by analyzing git commit logs, branch lineage, and diffs against the correct parent branch (develop vs main). Use this skill whenever the user asks to "PR 만들어줘", "PR 내용 정리", "PR 본문 작성", "Create a PR", "Summarize commits", "merge 준비", "릴리스 노트", or wraps up work on `features/*`, `feature/*`, `feat/*`, `hotfix/*`, `release/*`, `fix/*`, or `bugfix/*` branches — even if they don't say the word "PR" explicitly.