.ResourceFile() should allow to persist actual result in case of error.

[DiamondDragon]

At the moment it's very difficult to get actual result when assertion fails. In order to improve user expirience there should be possible to add some optional parameter \ method which allows to persist actual result.

                    .Expects<HttpResponse>(x => x
                        .Status(200)
                        .JsonBody()
                           .Matches()
                                .ResourceFile(persistActualResult: true)