Move test and rename

[MaceKuailv]

Rename a bunch of variables.

Move the tests that is left in #62 to unit tests.

[MaceKuailv]

This finally adresses issue #17 and mostly resolve issue #33

[codecov]

Codecov Report

Patch coverage: 85.06% and project coverage change: +0.27 🎉

Comparison is base (2cf0fe9) 94.65% compared to head (0b9a2e0) 94.92%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #64      +/-   ##
==========================================
+ Coverage   94.65%   94.92%   +0.27%     
==========================================
  Files          11       11              
  Lines        2655     2641      -14     
  Branches      709      705       -4     
==========================================
- Hits         2513     2507       -6     
+ Misses         53       48       -5     
+ Partials       89       86       -3     

Impacted Files	Coverage Δ
seaduck/topology.py	88.13% <65.00%> (ø)
seaduck/eulerian.py	94.82% <86.25%> (ø)
seaduck/kernel_weight.py	95.16% <90.90%> (ø)
seaduck/get_masks.py	96.26% <100.00%> (ø)
seaduck/lagrangian.py	97.37% <100.00%> (+1.62%)	⬆️
seaduck/ocedata.py	96.63% <100.00%> (-0.02%)	⬇️
seaduck/utils.py	95.81% <100.00%> (ø)

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[MaceKuailv]

By #33 I mean issue #52