Provide a bookmarking system like in Kiwix Desktop

[Jaifroid]

As suggested by @knowledge-is-power here, it would be good to have a bookmark system in Kiwix JS and Kiwix JS PWA/Windows. It would require #280 or similar, and probably also depends on #656 to allow seamless switching between bookmarks in different ZIM archives in a folder (to which the user has given read permission).

[kelson42]

This should simply work through the Web Browser bookmarking system. Would be a bad idea IMO to redo something special here.

[Jaifroid]

This should simply work through the Web Browser bookmarking system. Would be a bad idea IMO to redo something special here.

Agreed in principle, but unfortunately it doesn't work even in Service Worker mode. So we need to make it work, probably with #280. Even so, that would only work in Service Worker mode, which Firefox browser-extension users can't access. Plus there are other contexts where the browser's native bookmarking system is not available: PWA, mobile. Another solution is needed for these. That solution should be as close to the native browser system as possible, and should leverage its APIs where they are available.

[kelson42]

I would recommend to really try to secure we have proper URLs - which is I guess the main problem to get this working with the browser bookmark system. Then re-evaluate how important is that to provide a bookmark system for other use cases. Developing a simple bookmarking system is easy, but having a compeeting feature here will need a lot of work...