Make it possible to star content

[Ondřej Kupka]

It should be possible to start stories and comments so that it is easy to find them later.

So, we need to:

• Add a star icon to manage starred items when encountered.
• Add a starred section where one can manage all starred items all at once.

[Ondřej Kupka]

This is deployed, I just need to update the star service to index its DB properly.

[Ondřej Kupka]

This is done.