Allow external arrays in add depth; Add universal ping time alignment function

[ctuguinay]

Addresses #1368 and #1367.

Also, addresses #1332 since this was also related to the AZFP Glider notebook.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 77.77778% with 8 lines in your changes missing coverage. Please review.

Project coverage is 78.34%. Comparing base (9f56124) to head (c75592a).
Report is 133 commits behind head on main.

Files	Patch %	Lines
echopype/consolidate/api.py	81.25%	3 Missing ⚠️
echopype/utils/align.py	72.72%	3 Missing ⚠️
echopype/consolidate/ek_depth_utils.py	66.66%	1 Missing ⚠️
echopype/consolidate/loc_utils.py	66.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1369      +/-   ##
==========================================
- Coverage   83.52%   78.34%   -5.18%     
==========================================
  Files          64       27      -37     
  Lines        5686     2069    -3617     
==========================================
- Hits         4749     1621    -3128     
+ Misses        937      448     -489     

Flag	Coverage Δ
unittests	78.34% <77.77%> (-5.18%)	⬇️

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[ctuguinay]

@leewujung This should be ready for review

[leewujung]

Hey @ctuguinay : Thanks for the changes! Other than some minor wording/capitalization things and small questions, I think this is good to go!

[ctuguinay]

@leewujung Thanks for the review! This should be ready for a quick lookover again.

[leewujung]

Cool! This is ready to be merged now.