Move useStation into @neaps/tide-predictor

[bkeepers]

useStation is useful for pulling in station data from other sources. This moves it into @neaps/tide-predictor where it can be used without the heavy dependency of @neaps/tide-database.

[codecov]

Codecov Report

❌ Patch coverage is 98.21429% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 99.83%. Comparing base (6339fa8) to head (2696fb9).

Files with missing lines	Patch %	Lines
packages/tide-predictor/src/station.ts	97.95%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##              main     #198      +/-   ##
===========================================
- Coverage   100.00%   99.83%   -0.17%     
===========================================
  Files           67       68       +1     
  Lines          595      600       +5     
  Branches        72       75       +3     
===========================================
+ Hits           595      599       +4     
- Misses           0        1       +1     

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