配置nav的时候 支持children选项 可以方便进行nav的分组

[LiCHUYA]

Is your feature request related to a problem? Please describe.

在类似于下拉菜单分组的时候,往往会出现items嵌套层级比较深,不好进一步扩展维护

Describe the solution you'd like

我已经写好了demo,并且在vitepress源码中已经更改,但本人由于第一次pr,不太会使用,在这附上一些代码片段,以及使用示例。
`import type { DefaultTheme } from 'vitepress'
const handleData = [
{
id: 0,
text: '学习心得1',
children: [
{
groupId: '0-0',
text: '学习心得2',
link: 'xxx',
},
{
groupId: '0-0',
text: '学习心得3',
link: 'xxx',
},
{
groupId: '0-1',
text: '学习心得4',
link: 'xxx',
},
{
groupId: '0-2',
text: '学习心得5',
link: 'xxx',
},
{
groupId: '0-3',
text: '学习心得6',
link: 'xxx',
},
],
},
{
id: 1,
text: '学习心得1',
children: [
{
groupId: '1-1',
text: '学习心得2',
link: 'xxx',
},
{
groupId: '1-2',
text: '学习心得3',
link: 'xxx',
},
{
groupId: '1-3',
text: '学习心得4',
link: 'xxx',
},
],
},
]

function transformHandleDataToNav(handleData) {
return handleData.map((dataItem) => {
// 创建顶级nav项
const navItem = { text: dataItem.text, items: [] }

// 如果有子项，根据groupId进行分组
if (dataItem.children) {
  const groups = new Map()

  dataItem.children.forEach((child) => {
    const groupId = child.groupId.split('-')[1] // 假设groupId格式为"id-index"
    if (!groups.has(groupId)) {
      groups.set(groupId, [])
    }
    groups.get(groupId).push({ text: child.text, link: child.link })
  })

  // 将分组转换为items数组
  groups.forEach((groupItems) => {
    navItem.items.push({ items: groupItems })
  })
} else if (dataItem.link) {
  // 如果没有子项但有链接，直接设置链接
  navItem.link = dataItem.link
}

return navItem

})
}

const nav1 = transformHandleDataToNav(handleData)
console.log(nav1)

export const nav: DefaultTheme.Config['nav'] = nav1
`,在这个示例中,我们可以清晰的配置navGroup选项,只需要在groupid去配置,以"id-index"手动式声明,当然也可以在runtime时编译
添加id之类的。

Describe alternatives you've considered

No response

Additional context

No response

Validations

• Follow our Code of Conduct
• Read the docs.
• Read the Contributing Guidelines.
• Check that there isn't already an issue that asks for the same feature to avoid creating a duplicate.

[LiCHUYA]

[11-shou]

我也这么希望，兄嘚

[brc-dd]

Duplicate of #3816

[Zhengqbbb]

在开发完成前，如果定义需求可以这样玩：
https://vitepress.dev/guide/extending-default-theme#overriding-internal-components