R1:99ade500bc3a

Flesh out Conduit parmeter types for maniphest.search

Summary: Ref T9964. I left a couple of these unsupported for now since they're weird in some way.

Test Plan: {F1024031}

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T9964

Differential Revision: https://secure.phabricator.com/D14767