New year changes

[Mikejmnez]

This PR addresses issues #285 , #291 and #299. In particular:

• Drop no longer an argument (in llc_rearrange.LLC_Transformation.arctic_crown). As a result, the new od.grid of the resulting transformed dataset always has inner and outer as grid_coords.
• Adds API for llc_rearrange and associated functions and classes.
• updates history for 0.3.1.
• deleted find_cs_sn from ospy.utils. local_to_latlon is replaced by llc_local_to_lat_lon within llc_rearrange. This new function can rotate all vector fields and has a grid consistent with a staggered c-grid.
• viewer_to_range can now take all arguments from poseidon viewer. Included tests for this.
• xesfm is no longer pinned.
• updates binder environment: xarray and python are no longer pinned.

[codecov]

Codecov Report

Merging #300 (0a76507) into main (5663338) will increase coverage by 0.49%.
The diff coverage is 92.18%.

@@            Coverage Diff             @@
##             main     #300      +/-   ##
==========================================
+ Coverage   95.25%   95.74%   +0.49%     
==========================================
  Files           9        9              
  Lines        3898     3928      +30     
  Branches      833      850      +17     
==========================================
+ Hits         3713     3761      +48     
+ Misses        116       97      -19     
- Partials       69       70       +1     

Flag	Coverage Δ
unittests	95.74% <92.18%> (+0.49%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
oceanspy/compute.py	98.81% <ø> (+1.07%)	⬆️
oceanspy/subsample.py	98.04% <ø> (ø)
oceanspy/llc_rearrange.py	88.60% <92.00%> (+0.19%)	⬆️
oceanspy/utils.py	86.86% <92.85%> (+4.43%)	⬆️
oceanspy/_oceandataset.py	97.12% <0.00%> (-0.24%)	⬇️

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