Add a link to the root of all packages when using odig

[Khady]

On a page such as this one, there is no direct way to go back to the page that contains all the packages. The shortest path is to first click on "atdgen-runtime" and then "up". It would be great to have a direct link.

https://b0-system.github.io/odig/doc/atdgen-runtime/Atdgen_runtime/Json_adapter/index.html

[dbuenzli]

Note that you can also click on Up as fast as possible, works quite well in practice and may timewise be much shorter than the shortest path you mention.

[github-actions[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs.

[Khady]

if possible I'd still like to have this.

[dbuenzli]

Personally I don't think it's needed but I may be in the minority. In any case it's disgraceful to close that via a bot action.