Daniil/RubiksCubeMvvmv1.1.3130.71

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Key reasons for using the Rubik's Cube MVVM Toolkit in your applications: a. To get rid of the need to get/set Command properties in the view model. b. To simplify work with the configuration file. Common settings, such as Window State and Position of Window, are already implemented. c. To simplify work with validation of objects and view models. d. To detect incorrect command names/settings/validators