Bookmarks

[iliakan]

This discussion is moved from #2754

The idea is to have a bookmark or Add to List button on the articles page so that users can manage their lists inside the website only that will be a centralized and cloud sync feature so users don't need to fear data being lost.

Main features can be:

• Toggle button to add/remove an article into bookmarks/list.
• A page to have all the articles added to a list or bookmarked.
• Accessible for logged-in users only.
• More extension to the feature as per this comment.

In addition to bookmarks, we can use these emojis (icons) for other requested features:

📘 or 🔖: Bookmarked
✅: Studied (see #1913, which I'm really interested in)
🔄: Updated (Since your last visit/Since the last time you hit "studied"/...)