when saving sample and measurement info and rawFileId is 0, it is retrieved from DB

Add new spectrum operations and improve hex handling

- Added `GetSpectrumIdByNameAndSpectrumType` operation in `remoteoperations.xml` and `Enums.cs`.
- Enhanced `ToSolidColorBrush` in `Extensions.cs` to support 6 or 8 character hex strings.
- Imported necessary models in `RemoteOperationsManagerSpectraFileActions.cs`, `BaseViewModel.cs`, and `ChartViewModelInfo.cs`.
- Added `getSpectrumIdByNameAndSpectrumType` method in `RemoteOperationsManagerSpectraFileActions.cs`.
- Updated app version to `1.0.47.0` in `Package.appxmanifest`.
- Added logic in `ChartViewModelInfo.cs` for spectrum ID retrieval by name and type.
- Made `OnNavigatingFrom` synchronous and added null check for `ExMsg` in `MainViewModel.cs`.
- Refactored `MainViewModel.cs` for XML processing and spectrum saving.
- Added `StorageItemsHelper` dependency and new properties/methods in `MultipleSelectionViewModel.cs`.
- Introduced `GenericRequestByParametersModel` class for request modeling.