R1:d6a620be4577

Update Maniphest for modular transactions

Summary: Ref T12671. This modernized Maniphest transactions to modular transactions.

Test Plan:
- Create Task
- Edit Task
- Raise Priority
- Change Status
- Merge as a duplicate
- Create Subtask
- Claim Task
- Assign Project
- Move on Workboard
- Set a cover image
- Assign story points
- Change story points
- Generate lots via lipsum
- Bulk edit tasks
- Leave comments
- Award Token

I'm sure I'm missing something.

Reviewers: epriestley

Reviewed By: epriestley…