feat: add comprehensive management scripts for CodiMD

Add 9 management scripts to simplify CodiMD operations:
- start.sh: Start services with automatic .env setup
- stop.sh: Stop all services gracefully
- restart.sh: Restart all services
- logs.sh: View real-time logs for any service
- status.sh: Check service status and resource usage
- backup.sh: Backup database, uploads, and environment
- restore.sh: Restore from backups with interactive selection
- update.sh: Update Docker images with automatic backup
- cleanup.sh: Clean unused Docker resources

Add SCRIPTS.md with comprehensive usage documentation and examples.

Co-Authored-By: Claude Sonnet 4 <noreply@anthropic.com>

restart.sh

@@ -0,0 +1,21 @@
+#!/bin/bash
+# CodiMD 重啟腳本
+
+set -e
+
+echo "🔄 重啟 CodiMD 服務..."
+
+# 重啟服務
+docker-compose restart
+
+echo ""
+echo "⏳ 等待服務完全啟動..."
+sleep 5
+
+# 顯示服務狀態
+echo ""
+echo "📊 服務狀態："
+docker-compose ps
+
+echo ""
+echo "✅ CodiMD 已重啟"