Add support for HPSS

[DavidHuber-NOAA]

Description
Adds classes to interface with the hsi and htar commands with several helper methods for easier use. Resolves #2.

Type of change

• New feature (non-breaking change which adds functionality)
• This change requires a documentation update

How Has This Been Tested?

• pynorms
• pytests
• New pytests were added

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• My changes need updates to the documentation. I have made corresponding changes to the documentation
• My changes generate no new warnings
• New and existing tests pass with my changes

[codecov]

Codecov Report

Attention: Patch coverage is 23.21429% with 129 lines in your changes are missing coverage. Please review.

Project coverage is 47.99%. Comparing base (81bfec0) to head (7d7c83d).

Files	Patch %	Lines
src/wxflow/hsi.py	16.82%	89 Missing ⚠️
src/wxflow/htar.py	30.43%	32 Missing ⚠️
src/wxflow/fsutils.py	33.33%	8 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop      #22      +/-   ##
===========================================
- Coverage    50.88%   47.99%   -2.90%     
===========================================
  Files           16       18       +2     
  Lines         1476     1642     +166     
  Branches       313      330      +17     
===========================================
+ Hits           751      788      +37     
- Misses         669      798     +129     
  Partials        56       56              

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[aerorahul]

Looks good.

A few suggestions for follow-up PR:

• in the HSI and HTAR tests, the test for put and get should be separated out, and the same with cvf, xvf and tell. They should be unit tests for the methods they call.
• Some of the arguments that are passed to the HSI and HTAR classes could be improved for user experience. For e.g. if a user wants a verbose mode, the __init__ class should have a verbose = True|False rather than the user to know the appropriate HSI argument -e to echo every command.
• Use None in place of empty strings "".

[DavidHuber-NOAA]

I just found a bug in Htar that I am fixing now. I will let you know when it's ready to go again. Should be soon.

[DavidHuber-NOAA]

@aerorahul Alright, it's good to go. My tests were only testing the case of sending one file to an HPSS tar archive. Expanding that to test multiple files found that each file being sent to an archive needs its own argument. The test has been updated to check for this and it passes on Hera.

[aerorahul]

Is this necessary since the type is str as defined in the method signature?
If this could be a Path, then it makes sense.

[DavidHuber-NOAA]

The pytests define these inputs as Paths. The signature is a suggestion -- Python will accept whatever type you throw at it.

[aerorahul]

looks good.