Feature required: fully support API methods under "manifest" category

[awayfromtty]

As part of the MCP Server development, we aim to incrementally support all available API endpoints by module. This issue tracks the implementation of all API methods under the manifest category.

Goals

• Enumerate all API endpoints under manifest.*
• Implement method bindings for each endpoint
• Ensure proper request formatting and response parsing
• Add unit test coverage for each API method
• Add integration test if necessary to verify end-to-end functionality

Reference

• Phorge Conduit API list: https://we.phorge.it/diviner/find/?name=Conduit_API%3A_Using_Edit_Endpoints&type=article&jump=1

Checklist

• maniphest.createtask
• maniphest.gettasktransactions
• maniphest.info
• maniphest.priority.search
• maniphest.query
• maniphest.querystatuses
• maniphest.search
• maniphest.status.search
• maniphest.update

This issue is part of a broader effort to support all Phabricator API methods grouped by category. Related issues will track other groups like user.*, diffusion.*, harbormaster.*, etc.