feat: 新增docs静态资源与Electron主进程

添加了docs目录及其静态资源文件，支持前端文档和演示页面部署。新增dist-electron/main.js，实现Electron主进程窗口加载本地docs或开发服务器。更新.gitignore，允许docs目录纳入版本控制。

docs/assets/rolldown-runtime-tX5UdD3f.js

@@ -0,0 +1 @@
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