build(widget): 添加版本号并配置构建banner

在package.json中添加版本号字段，并在vite配置中读取版本号生成构建banner，用于标识构建产物版本

cwd-admin/widget/package.json

@@ -1,5 +1,6 @@
 {
   "name": "widget",
+  "version": "0.0.1",
   "private": true,
   "type": "module",
   "scripts": {

cwd-admin/widget/vite.config.js

@@ -1,7 +1,11 @@
 import { defineConfig } from 'vite';
 import { resolve } from 'path';
+import { readFileSync } from 'fs';
 import cssInjectedByJsPlugin from 'vite-plugin-css-injected-by-js';
 
+const pkg = JSON.parse(readFileSync(new URL('./package.json', import.meta.url), 'utf-8'));
+const banner = `/*! CWDComments widget v${pkg.version} */`;
+
 export default defineConfig({
 	plugins: [cssInjectedByJsPlugin()],
 	resolve: {
@@ -19,6 +23,7 @@ export default defineConfig({
 		rollupOptions: {
 			output: {
 				exports: 'named',
+				banner,
 			},
 		},
 		sourcemap: false,