feat: all 3 commands — gacp, lock, unlock

gacp.md

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+Git add, commit, and push. Run this workflow:
+
+1. Run `git status` to see what's dirty/untracked.
+2. Run `git diff --stat` for a summary of changes.
+3. If there are untracked files that look unintentional (build artifacts, temp files, secrets), ask the user before staging them.
+4. If there are mixed concerns (changes to unrelated files), ask whether to commit everything together or split into separate commits.
+5. Stage all intended files with `git add`.
+6. Write a concise commit message matching the repo's existing style (check `git log --oneline -5` for convention). Use conventional commits if the repo uses them.
+7. Commit.
+8. Push to the current tracking branch. If no upstream is set, ask which remote/branch to push to.
+
+Be interactive — ask questions when something looks off, but don't over-ask on straightforward cases. If everything is clean and obvious, just do it.