Bookmarking for offline data

[ShirleyNekoDev]

Blocked by

• Add local database #13 - Requires local database

Description

As a user, I'd like to bookmark a course, news or info bit to find it again later.
It would be nice to have the bookmarked page offline available.

Requirements
This would require:

• an bookmarking action on each of the entry pages.
• an overview page of each bookmarked page.
• actions to view and remove (delete from local store/remove bookmark) a bookmarked page.

Implementation details
It would be possible to expand the tagging system for bookmarking purposes. If we divide tags in local and cloud/given tags and use page type and bookmarked as tags, we would have a simple system to find stored data.
Furthermore, non-bookmarked cached entries could be pruned via time based strategies to keep the local database small.

[ShirleyNekoDev]

This will be specified via further tickets.