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.

scripts/verify.local.sh.example

@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+# Ejemplo de overlay local por proyecto.
+# Copiar a scripts/verify.local.sh y adaptar.
+
+set -euo pipefail
+
+echo "[LOCAL] checks específicos del proyecto"
+# Ejemplos:
+# alembic check
+# pytest -m smoke -q
+# npm run lint
+
+echo "[LOCAL] OK"