Add RemoteOperationType enum and RemoteOperationModel class

Introduced a new namespace `INAF.Apps.Uwp.SLabDataManager.Values` containing the `Enums` class with a new `RemoteOperationType` enumeration. This enum includes values for various remote operations like authentication, spectrum file actions, and user settings.

Added a new class `RemoteOperationModel` in the `INAF.Libraries.MAUI.HyperLab.RemoteOperations` namespace. This class has two properties: `Type` (of type `RemoteOperationType`) and `Url` (of type `string`). The `RemoteOperationModel` class utilizes the `RemoteOperationType` enum from the `INAF.Apps.Uwp.SLabDataManager.Values.Enums` namespace.

These changes were applied in multiple locations within the codebase.