建议GridNav组件能新增分群的设定，目前取得的资料只能依序展开

#### 是否关联于某个问题吗：
建议GridNav组件能新增分群的设定，目前取得的资料只能依序展开

#### 预期的解决方案：

#### 其他可接受方案：

#### 任何附加信息：
如果取得的数据较多，没有分群会有点杂乱

Start by locating the GridNav component and reviewing how its current data is rendered sequentially. Define how grouping should be configured and how grouped results should appear, using the attached image as the visual reference. The issue names no files or tests, so identify the relevant component entry point and existing test location before implementation.

Written by the indexing model from the issue text.