feat: implement CI (Continuous Intelligence) autonomous engineering harness

Implements the full PRD for CI - a fully autonomous AI-driven software
engineering harness derived from Learnship's architecture.

Core components:
- CI Orchestrator agent with autonomous pipeline (SPECIFY → CLARIFY →
  RESEARCH → PLAN → EXECUTE → VERIFY → COMPLETE)
- Decision Engine with confidence thresholds (high/medium/low)
- Clarify Phase with question budget and default acceptance
- Escalation Protocol with timeout auto-proceed
- Audit Trail system (.ci/audit/) for post-hoc review
- Error Recovery with retry, plan revision, and rollback

18 agents (all Learnship agents + Orchestrator):
- Autonomous behavioral modifications per PRD §7.1
- Agent registry with factory pattern

11 CLI commands:
- ci init, ci run, ci quick, ci debug, ci verify
- ci review, ci status, ci audit, ci clarify
- ci rollback, ci ship

4-layer verification system:
- Structural, Behavioral, Security, Code Quality

3 autonomy levels: full, supervised, guided
Compatible with Learnship artifact schemas (.planning/)

templates/DECISIONS.md

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+# DECISIONS
+
+> All autonomous decisions are logged here for post-hoc review.
+
+## Decision Log
+
+Decisions are automatically logged to `.ci/audit/` with:
+- Timestamp
+- Decision ID
+- What was decided
+- Why (reasoning chain)
+- Confidence level
+- What alternatives were considered
+- What the human would have been asked in Learnship mode
+
+## Reviewing Decisions
+
+Run `ci audit` to review all autonomous decisions.
+Run `ci audit --verbose` for detailed decision information.

templates/config.json

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+{
+  "autonomy": {
+    "level": "full",
+    "escalation_hooks": ["deploy", "delete_data", "merge_to_main"],
+    "clarify_budget": 10,
+    "decision_confidence_threshold": 0.6,
+    "max_revision_iterations": 3,
+    "max_verification_retries": 2,
+    "escalation_timeout_ms": 300000
+  },
+  "model_profile": "quality",
+  "parallelization": {
+    "enabled": true,
+    "max_concurrent_agents": 5,
+    "min_plans_for_parallel": 2
+  },
+  "verification": {
+    "automated_only": true,
+    "escalate_visual": true,
+    "escalate_external_integration": true,
+    "test_first": false
+  },
+  "security": {
+    "auto_accept_low_severity": true,
+    "auto_mitigate_medium_severity": true,
+    "escalate_high_severity": true
+  },
+  "git": {
+    "branching_strategy": "phase",
+    "auto_commit": true,
+    "auto_push": false
+  }
+}

templates/specification.md

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+# Project: {{PROJECT_NAME}}
+
+## Objective
+{{OBJECTIVE}}
+
+## Requirements
+{{REQUIREMENTS}}
+
+## Constraints
+{{CONSTRAINTS}}
+
+## Out of Scope
+{{OUT_OF_SCOPE}}