Implement netCDF intermediate files

[Klankers]

If netCDF translation of the source .hex is successful, the resulting .nc files should be a fraction of the source file size. Using this, we can stage the data at different processing steps to make it easier for reruns, troubleshooting, and modifying procedures.

As discussed 20240612:

• Between parsing and assmebly
• Before fitting
• Before analysis

The final products will be the exported data, which would be similar to the "before analysis" stage (though binned and returning fewer derived variables)

[Klankers]

Added notes to #63 . This will be happening during refactoring and no longer warrants its own issue.