feat: automatically redirect when index is empty

[Tahul]

We added navigation.redirect, but the UX could be better for users.

We could automatically redirect to first file in order (0., 1. or the first in order, or the first in query if no order specified).

It could be useful because I feel that using directories index.md for configuration will be an usual pattern, and using index.md does gives an empty page that can be browser into navigation elements such as PagePrevNext component.

You can easily reproduce this by browsing the last page of a directory in which the following directory has a page index.

PagePrevNext component should also be updated I think.

Maybe displaying the name of the next/previous directory when changing categories or specifying it as usual with category name + page name.

[Tahul]

As an example, I would like you to get a look at this feature from @nuxt/content:
https://content.nuxtjs.org/fr/fetching#surroundslug-options

Which I think we should have, and be used in this feature.

[Tahul]

I think also that an empty index.md placed at the root of a directory, without any other content than front-matter should not be treated as a page.

WDYT @farnabaz ?

[farnabaz]

https://content.nuxtjs.org/fr/fetching#surroundslug-options

This feature is what we use to fetch prev & next pages in bottom navigation

I think also that an empty index.md placed at the root of a directory, without any other content than front-matter should not be treated as a page.

What do you mean by not treating as a page? We need them in navigation hierarchy.

[atinux]

Cannot we use the navigation to do so? 🤔