Add option to save WindNet batches

[jacobbieker]

Pull Request

Description

Adds Windnet batch creation for wind forecasting

Fixes #

How Has This Been Tested?

Unit test

• Yes

Checklist:

• My code follows OCF's coding style guidelines
• I have performed a self-review of my own code
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• I have checked my code and corrected any misspellings

[codecov]

Codecov Report

Attention: 28 lines in your changes are missing coverage. Please review.

Comparison is base (7eee4bb) 49.93% compared to head (2fdb5d9) 50.08%.

Files	Patch %	Lines
pvnet/data/wind_datamodule.py	52.17%	22 Missing ⚠️
pvnet/data/utils.py	83.33%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #99      +/-   ##
==========================================
+ Coverage   49.93%   50.08%   +0.14%     
==========================================
  Files          23       26       +3     
  Lines        1642     1691      +49     
==========================================
+ Hits          820      847      +27     
- Misses        822      844      +22     

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[dfulu]

Looks really good!