curl ... | bash -s -- --update pulls the latest .ai/ files and exits
without scanning projects or touching docs templates.
Bootstrap captures the pre-pull commit hash and forwards it to local
mode; local mode compares with HEAD and either reports "already up to
date" or prints new commit messages with git log --oneline.
FR-1.5 added to apply-requirements.md. README and apply.md updated.
- ask [y/N] per project when docs/ folder is missing
- bootstrap reopens stdin from /dev/tty so prompts work through curl | bash
- fallback to silent skip when stdin is not a TTY (non-interactive)
- docs/apply-requirements.md: FR-1.4 and FR-5.1 updated
