Add real-time web dashboard (dashboard.html) and HTTP API server (server.js).
18 REST endpoints expose all orchestrator operations. Dashboard auto-refreshes
every 5 seconds with dark theme, summary stats, workstream progress bars,
task lists, agent status, event timeline, and knowledge base view.
Zero external dependencies - uses Node.js built-in http module.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
