Add download button in the preview of ZIMs in library.kiwix.org

[D3V-D]

Most users probably preview a ZIM before downloading, and thus it would make sense to have a download option somewhere in the preview; probably in the top-bar. I'll send a demo here once I've cloned the repo and made it.

[muskan2622]

/assign

[mgautierfr]

Related to https://github.com/kiwix/libkiwix/issues/1040 but not exactly the same as here it is about a download button in the preview of zim file (top bar), not in library view.

@muskan2622 Please do a PR and we will review.

[muskan2622]

Sure

[kelson42]

@yummyash Maybe you would be interested to alsoimplement this kind of "sibling download issue" too?

[yummyash]

Yes but could you tell that my first solving is helpful or not

[kelson42]

AFAIK, looks great! You are on the right track! Kudos!