chore: 更新版本号至0.1.4并更新前端框架集成文档

- 将主项目及所有子模块的package.json版本号从0.1.4-rc-2更新为正式版0.1.4
- 重写前端配置指南，为Vue3、Vue2和React提供清晰的模块化集成示例
- 移除旧的Vue单文件组件封装示例，推荐使用npm包直接导入的方式

docs/widget/package.json

@@ -1,6 +1,6 @@
 {
   "name": "cwd-widget",
-  "version": "0.1.4-rc-2",
+  "version": "0.1.4",
   "description": "Server-free, extremely fast and secure, plug-and-play commenting system based on Cloudflare Workers and the Global Edge Network.",
   "type": "module",
   "author": "anghunk",