Changes to Create a workflow schedule.

added the non-success response with the status 403

added the non-success response with the status 415

added the non-success response with the status 422

the response property details became nullable for the status 400

the response property details became nullable for the status 404

the response property details became nullable for the status 409

the response property details became nullable for the status 500

the response property inputs became nullable for the status 201

the request property inputs became nullable

endpoint added