Scaffolds bd preflight for PR readiness checks. Currently prints a
static checklist of common pre-PR validation items:
- Tests pass
- Lint passes
- No beads pollution
- Nix hash current
- Version sync
--check and --fix flags are documented but not yet implemented
(see bd-lfak.2 through bd-lfak.5 for roadmap).
(bd-lfak.1)
Cherry-picked from polecat/amber-1767146829144
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
