Changes to Get the health status of the application

added the media type application/json for the response with the status default

the response's body type changed from string to object for status 200

added the optional property status to the response with the 200 status

added the media type application/json for the response with the status 200

api operation id AppController_getHealthStatus removed and replaced with getHealthStatus

api tag health added

api tag App removed

endpoint added