Ios-parser-extra-vocabulary

[JessyBarrette]

This PR adds the following features to the IOS data format parser:

1. Add the IosObsFile ObsFile class to_xarray() method: This tool convert an ObsFile object class to an xarray object
2. Add a ios_vocabulary.csv which is used to map IOS variables/units to a specific list of attributes.
3. Create a pytests environment to test the IOS files conversion and add to github workflow test
4. Add new IOS data type:
   • ANE: weather station
   • DRF: drifter
   • LOOP: ?
   • MED: ?
   • TOB: TSG ship data
   • UBC: historical UBC profile data (bottle, CTD?)
5. Add new subclass from ObsFile class GenFile to parse any of the data types.
6. Handle IOS Channel Tables where some terms are quoted and extend over the original column width