Add date and media type to content packages

[TimJentzsch]

The cards on https://library.kiwix.org to download content packages currently provide a very minimal description of the package.

Often, a card appears multiple times with the same title and description, but different download size. It is unclear what the difference is, only taking a peek at the download URL reveals that it is the type of media (maxi/nopic/mini) and date of the archive.

I suggest to add at least the date of the archive and the media type to the cards, so that users can properly decide which package they want to download.

Example:

The three cards for Wikipedia are seemingly identical, the only difference is the download size. In reality, they differ in the media type (maxi/nopic/mini) and date of the archive, as revealed by the download URL.
The difference between nopic and mini is also not apparent.

[kelson42]

Agree, but this ticket is basically a duplicate of:

• Kiwix serve welcome page filter by content type / Flavour libkiwix#545
• Display of tiles on library.kiwix.org should show date of archive #551
• Enable basic html formatting in content descriptor openzim/overview#11