MINOR FIXES

Update spectrum model and version number

- Modified `ChartSpectrumModel` to include a new `filepath` parameter and removed the `Title` assignment.
- Updated version number in `Package.appxmanifest` from `1.0.53.0` to `1.0.54.0`.
- Changed `readFileAsync` in `MainViewModel` to use `SpectrumLevel.SingleAcquisition` for spectrum processing.