Implements a more informative hovercard for wiki documents

Summary:
The current hovercard of a wiki document has no further information except the title. This commit adds object type, project tags, parent documents, last author and last edited time to the card.

Preview:

{F313614}

Preview in a pessimistic case:

{F325478}

Closes T15433

Test Plan: Edit a wiki document with/without project tags and parent documents and see the hovercard in the feed.

Reviewers: O1 Blessed Committers, valerio.bozzolan, avivey, Cigaryno

Reviewed By: O1 Blessed Committers, valerio.bozzolan, avivey, Cigaryno

Subscribers: avivey, speck, tobiaswiese, valerio.bozzolan, Matthew, Cigaryno

Maniphest Tasks: T15433

Differential Revision: https://we.phorge.it/D25303