Add spk_ezr function to Almanac to closesly match SPICE's spkezr function + various minor fixes

[ChristopherRabotin]

Summary

The crux of this issue was not an ANISE bug, but in fact it was an issue with the way I was calling transform in the test. I've fixed this by correcting the observation frame and by adding an spkezr function.

Fix #130.

Also fix #284 by adding the proper display of the file record errors.

Also fix #302 -- #302 (comment)

Architectural Changes

No change

New Features

No change

Improvements

No change

Bug Fixes

No change

Testing and validation

• Uncommented the test from Investigate return case of de440s_transform_verif_venus2emb #130.
• Add gmat-hermite-big-endian.bsp, ensuring that loading it on a little endian platform raises a WrongEndian error and correctly display that error.

Documentation

This PR does not primarily deal with documentation changes.

[codecov]

Codecov Report

Attention: Patch coverage is 40.54054% with 22 lines in your changes missing coverage. Please review.

Project coverage is 80.44%. Comparing base (a63436f) to head (c9091c6).

Files with missing lines	Patch %	Lines
anise/src/almanac/transform.rs	0.00%	20 Missing ⚠️
anise/src/naif/daf/daf.rs	93.75%	1 Missing ⚠️
anise/src/naif/pck/mod.rs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #313      +/-   ##
==========================================
- Coverage   80.53%   80.44%   -0.09%     
==========================================
  Files          76       76              
  Lines        9754     9748       -6     
==========================================
- Hits         7855     7842      -13     
- Misses       1899     1906       +7     

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