feat: 添加员工门户项目及相关后端改造

- 新增 hzhub-portal-employee 员工门户前端项目（基于 Vue3 + Element Plus）
- 后端登录接口增加返回 nickName 字段
- 移除 KnowledgeInfoController 的 @SaCheckPermission 注解
- 删除 hzhub-portal-company 旧门户项目
- 更新项目文档和架构说明
- 添加后台运行管理脚本（start-all.sh / status-all.sh / stop-all.sh）
- 更新 docker-compose 配置

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

hzhub-portal-employee/.build/plugins/svg-icon.ts

@@ -0,0 +1,21 @@
+import path from 'node:path';
+import { createSvgIconsPlugin } from 'vite-plugin-svg-icons';
+
+const root = path.resolve(__dirname, '../../');
+
+export default function createSvgIcon(isBuild: boolean) {
+  return createSvgIconsPlugin({
+    iconDirs: [
+      path.join(root, 'src/assets/icons/svg'),
+      path.join(root, 'src/assets/icons/Buildings'),
+      path.join(root, 'src/assets/icons/Business'),
+      path.join(root, 'src/assets/icons/Device'),
+      path.join(root, 'src/assets/icons/Document'),
+      path.join(root, 'src/assets/icons/Others'),
+      path.join(root, 'src/assets/icons/System'),
+      path.join(root, 'src/assets/icons/User'),
+    ],
+    symbolId: 'icon-[dir]-[name]',
+    svgoOptions: isBuild,
+  });
+}