Add /design-gate command that provides binary pass/fail validation for
design system compliance. This command is used by projman orchestrator
during sprint execution to gate issue completion for Domain/Viz issues.
Features:
- Binary PASS/FAIL output for automation
- Checks only FAIL-level violations (invalid props, missing components)
- Integrates with projman sprint execution workflow
- Lightweight alternative to /design-review
Closes#360
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
