refactor: complete bootstrap of ARNES agent harness framework

- Add complete agent harness structure with 8 roles (leader, triager, architect, implementer, reviewer, security, qa, documenter)
- Implement strict workflow with 9 stages and mandatory gates
- Add comprehensive verification script and runtime status tracking
- Create artifact-based evidence system with contracts and schemas
- Add agent policy matrix with permissions and anti-cheat rules
- Include test suite (44 tests passing) and CI-ready structure
- Add documentation: README, HOWTO, CHECKPOINTS, templates
- Configure model routing policies and token-aware task assignment
- Add BDD/SDD specification guides and feature templates
- Include starter pack for quick project onboarding

All verification checks pass. Framework ready for production use.

work/runtime-status.json

@@ -0,0 +1,11 @@
+{
+  "feature_id": null,
+  "stage": "idle",
+  "agent": "leader",
+  "action": "Sin ejecución activa",
+  "state": "waiting",
+  "next_agent": "leader",
+  "waiting_for": "Seleccionar una feature pending y actualizar este estado",
+  "updated_at": "2026-05-17T00:00:00Z",
+  "timeline": []
+}