feat: Add regrid_Sv functionality to be able to regrid Sv dataset

[lsetiawan]

Overview

This PR add regridding functionality for existing Sv data

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 95.29412% with 4 lines in your changes are missing coverage. Please review.

Project coverage is 70.38%. Comparing base (8600a59) to head (bb257cc).
Report is 38 commits behind head on dev.

Files	Patch %	Lines
echopype/commongrid/regrid.py	97.43%	2 Missing ⚠️
echopype/utils/misc.py	33.33%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##              dev    #1291       +/-   ##
===========================================
- Coverage   83.80%   70.38%   -13.42%     
===========================================
  Files          64       11       -53     
  Lines        5705      824     -4881     
===========================================
- Hits         4781      580     -4201     
+ Misses        924      244      -680     

Flag	Coverage Δ
unittests	70.38% <95.29%> (-13.42%)	⬇️

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[lsetiawan]

@leewujung This is currently a draft PR because I don't have tests for it yet. However, could you please start reviewing the implementation and help me try out different scenarios to make sure I have it implemented correctly? Thanks!

[leewujung]

@lsetiawan : Could you put in at least a couple test so that it's easier to step through the code? Thanks!