Add two GitHub Actions workflows: 1) copilot-auto-assign.yml - auto-assign copilot-swe-agent when issue gets copilot label 2) copilot-pr-monitor.yml - monitor Copilot PRs for review comments, CI failures, merge events and notify via issue comments. Workflow drafts ready. Sprint 2.2a Phase 2. See Piboonsak/Openclaw#164 and openclaw#165.