Support .into_json_response() with Axum

Summary:
Allow to convert an arbitrary type into a API JSON response
simply adding .into_json_response().

For Alkane, adding FailureResponse trait to handle the errort part of a Result.

Ref T2133

Test Plan: Tested with D3717 for Alkane

Reviewers: dereckson

Reviewed By: dereckson

Maniphest Tasks: T2133

Differential Revision: https://devcentral.nasqueron.org/D3718