feat: add Claude Code orchestration setup with MCP and subagents

Add comprehensive Claude Code configuration for Rust/Go projects, including:
- CLAUDE.md with delegation heuristics and guardrails
- Subagents: qwen3-worker (LM Studio), code-reviewer, task-planner
- Skills for delegation rules and Rust/Go conventions
- Hooks: post-write-lint, pre-bash-guard, subagent-stop-log
- MCP server (stdio) to interface with LM Studio
- README and technical report documenting the architecture

.claude/hooks/subagent-stop-log.sh

@@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+# Observabilité : log chaque fin de subagent
+TIMESTAMP=$(date -u +"%Y-%m-%dT%H:%M:%SZ")
+PAYLOAD=$(cat)
+AGENT=$(echo "$PAYLOAD" | python3 -c "import json,sys; d=json.load(sys.stdin); print(d.get('agent_name','unknown'))" 2>/dev/null)
+echo "$TIMESTAMP agent=$AGENT" >> .claude/logs/subagent-decisions.log