build(ci/cd): add full automated CI/CD setup scripts

新增了完整的Novalon网站CI/CD自动化配置工具链，包括：
1.  一键启动脚本、主配置脚本与配置文件
2.  Jenkins容器部署、Gitea Webhook配置、环境验证脚本
3.  完善的中文文档与使用示例
4.  优化了Jenkinsfile流水线，新增构建保留、并发限制、备份清理等功能

scripts/setup-cicd/cicd.config

@@ -0,0 +1,36 @@
+#!/bin/bash
+
+JENKINS_URL="http://ci.f.novalon.cn:8080"
+JENKINS_HOST="ci.f.novalon.cn"
+JENKINS_PORT=8080
+JENKINS_CONTAINER_NAME="jenkins"
+JENKINS_IMAGE="jenkins/jenkins:lts-jdk17"
+
+GITEA_URL="https://git.f.novalon.cn"
+GITEA_HOST="git.f.novalon.cn"
+
+GITEA_USERNAME="zhangxiang@novalon.cn"
+GITEA_PASSWORD="qerqek-cavxaC-5jupri"
+GITEA_TOKEN=""
+
+JENKINS_ADMIN_USER="zhangxiang"
+JENKINS_ADMIN_PASSWORD="Vaptyc-jadpe1-fywmaj"
+JENKINS_API_TOKEN=""
+
+SERVER_IP="139.155.109.62"
+SERVER_USER="root"
+DEPLOY_ROOT="/home/novalon/docker-app"
+STATIC_DIR="novalon-static"
+NGINX_CONTAINER="novalon-nginx-secure"
+DOMAIN="https://novalon.cn"
+
+REPO_OWNER="novalon"
+REPO_NAME="novalon-website"
+JOB_NAME="novalon-website-ci-cd"
+WEBHOOK_TOKEN="novalon-website-ci-token"
+
+NODE_VERSION="18"
+NPM_REGISTRY="https://registry.npmmirror.com"
+BACKUP_RETENTION_COUNT=3
+
+DOCKER_NETWORK="novalon-network"