Add filter for fixing UKRI/NERC/British Geological Survey Space Geodesy Facility (SGF) SP3 files in v00 format that don't respect SP3c format

See forum discussion SP3 precise orbit file is not compliant with SP3 format c (extra comment line).

This can be fixed by adding a dedicated DataFilter as follows:

  // setup filter
  final FiltersManager manager = new FiltersManager();
  manager.addFilter(new NsgfV00Filter()); // we could also add other classical filters, like .gz uncompression and so on...)

  for (DataSource original : myListOfSP3DataSources) {
    // only the nsgf v00 files will be filtered, replacing their 'c' format marker by a 'd' format marker
    final SP3 file = parser.parse(manager.applyRelevantFilters(original));
  }