FEAT Create CoreConfigModel

core/Controllers/CoreController.php

core/Controllers/ParametersController.php

core/Controllers/UserController.php

core/Models/CoreConfigModel.php

core/Models/SecurityModelAbstract.php

modules/attachments/Controllers/AttachmentsController.php

modules/attachments/Models/AttachmentsModelAbstract.php

modules/visa/Controllers/VisaController.php

rest/index.php