Changes to Get the state of a project's editor machine

the response property machine/error became nullable for the status 200

the response property machine/sandboxEnvironmentId became nullable for the status 200

response property machine/error list-of-types was narrowed by removing types null from media type application/json of response 200

response property machine/sandboxEnvironmentId list-of-types was narrowed by removing types null from media type application/json of response 200

added the required property machine/startingPhase to the response with the 200 status

added the required property machine/sandboxEnvironmentId to the response with the 200 status

endpoint added