feat: Add SearchPage #2247 (#2248)

### What problem does this PR solve?

feat: Add SearchPage #2247

### Type of change


- [x] New Feature (non-breaking change which adds functionality)

web/src/layouts/components/header/index.tsx

       { path: '/chat', name: t('chat'), icon: MessageOutlined },
       { path: '/flow', name: t('flow'), icon: GraphIcon },
       { path: '/file', name: t('fileManager'), icon: FileIcon },
+      { path: '/search', name: t('search'), icon: FileIcon },
     ],
     [t],
   );

web/src/locales/en.ts

       logout: '登出',
       fileManager: 'File Management',
       flow: 'Agent',
+      search: 'Search',
     },
     knowledgeList: {
       welcome: 'Welcome back',

web/src/locales/zh-traditional.ts

       logout: '登出',
       fileManager: '文件管理',
       flow: 'Agent',
+      search: '搜尋',
     },
     knowledgeList: {
       welcome: '歡迎回來',

web/src/locales/zh.ts

       logout: '登出',
       fileManager: '文件管理',
       flow: 'Agent',
+      search: '搜索',
     },
     knowledgeList: {
       welcome: '欢迎回来',

web/src/pages/search/index.tsx

+const SearchPage = () => {
+  return <div>SearchPage</div>;
+};
+
+export default SearchPage;

web/src/routes.ts

         path: '/flow/:id',
         component: '@/pages/flow',
       },
+      {
+        path: '/search',
+        component: '@/pages/search',
+      },
     ],
   },
   {