Use PhrictionDocumentQuery to load documents

Summary: Ref T4029. We use a lot of very outdated content loading in Phriction, which blocks T4029.

Test Plan:

• Called phriction.info
• Called phriction.history
• Called phriction.edit
• Viewed document list.
• Deleted a document.
• Viewed history.
• Viewed a diff.
• Created a document.
• Edited a document.
• Moved a document.
• Tried to overwrite a document with "new".
• Tried to overwrite a document with "move".
• Viewed a moved document note.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: shadowhand, epriestley

Maniphest Tasks: T4029

Differential Revision: https://secure.phabricator.com/D9194