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>

start.sh

@@ -0,0 +1,46 @@
+#!/bin/bash
+# CodiMD 啟動腳本
+
+set -e
+
+echo "🚀 啟動 CodiMD 服務..."
+
+# 檢查 .env 是否存在
+if [ ! -f .env ]; then
+    echo "⚠️  .env 檔案不存在，從 .env.example 複製..."
+    cp .env.example .env
+    echo "✅ 已建立 .env 檔案"
+    echo "⚠️  請編輯 .env 檔案，設定強密碼和域名"
+    echo "   nano .env"
+    echo ""
+    read -p "按 Enter 繼續或 Ctrl+C 取消..."
+fi
+
+# 檢查 Docker 是否運行
+if ! docker info > /dev/null 2>&1; then
+    echo "❌ Docker 未運行，請先啟動 Docker"
+    exit 1
+fi
+
+# 啟動服務
+docker-compose up -d
+
+echo ""
+echo "⏳ 等待服務啟動..."
+sleep 5
+
+# 顯示服務狀態
+echo ""
+echo "📊 服務狀態："
+docker-compose ps
+
+echo ""
+echo "✅ CodiMD 已啟動！"
+echo ""
+echo "🌐 訪問地址："
+echo "   本地: http://localhost:3000"
+echo "   外部: http://$(hostname -I | awk '{print $1}'):3000"
+echo ""
+echo "📝 查看日誌: ./logs.sh"
+echo "🛑 停止服務: ./stop.sh"
+echo "🔄 重啟服務: ./restart.sh"