feat(aircoding): AirCoding V2 baseline — deterministic multi-agent architecture

Forked from OpenCode v1.17.4 with multi-agent system:
- 5 agents: aircoding, scheduler, worker, architect, reviewer
- Deterministic DAG scheduling engine (coordinator_tick)
- Tool whitelists as hard enforcement
- AirCoding validation plugin
- V1 requirements: C4 docs, ADR, AGENTS.md, debug-log.md
- Design documents in docs/

script/hooks

@@ -0,0 +1,19 @@
+#!/bin/sh
+
+if [ ! -d ".git" ]; then
+    exit 0
+fi
+
+mkdir -p .git/hooks
+
+cat > .git/hooks/pre-push << 'EOF'
+#!/bin/sh
+# Ensure dependencies are installed before typecheck
+if command -v bun >/dev/null 2>&1; then
+  bun install >/dev/null 2>&1 || true
+fi
+bun run typecheck
+EOF
+
+chmod +x .git/hooks/pre-push
+echo "✅ Pre-push hook installed"