Add status, dated-added, date-updated, favorite

[masonfocus]

Add status, dated-added, date-updated, favorite in item type so that they can be used in template.

[masonfocus]

These alterations was meant to solve this #67

[nybbles]

Thanks for this patch!

The current behavior is to use numbers to represent status, which is not very user-friendly, especially for Obsidian users who don't know how APIs should work under the hood. What do you think about using status strings instead, i.e. "unread", "archived", "deleted"?

[betolink]

Really looking forward to this, I just started to use Obsidian last week and wanted to import my bookmarks from Pocket and to my surprise they come with no dates or other available metadata.