Support description text, tags for backends that support it

### Describe the feature you'd like to request

Many browsers (e.g., Firefox, Vivaldi) support text annotations or tags for bookmarks. It would be excellent if those plugins for browsers that do so, would also sync such text annotations and if the Android app would support it. For browsers (e.g., Chrome) that don't support these features, the text annotations should be ignored (but not overwritten/deleted) on updates.

### Describe the solution you'd like

Plugins for browsers like firefox, vivaldi etc., and the Android app should support text annotations/tags. This info should be included in the master file on the server. Other plugins should ignore this info but never overwrite and delete it.

### Describe alternatives you've considered

Tags could be added to the bookmark name but this would quickly become cumbersome and bookmark names could grow very big.