Draft: Modify extract_season to return only "full" seasons upon request

[k-a-webb]

Description

Related issue: #2591

Include a parameter full (I'm open to this being a different word) which triggers extract_season to only return "complete" seasons. For example, "DJF" and never just "JF". Invokes extract_time to clip the time vector prior to season extraction

Closes #issue_number

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.97%. Comparing base (bd617f5) to head (e5c5336).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2597   +/-   ##
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  Coverage   94.96%   94.97%           
=======================================
  Files         253      253           
  Lines       14701    14716   +15     
=======================================
+ Hits        13961    13976   +15     
  Misses        740      740           

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[valeriupredoi]

many thanks @k-a-webb - it's always good practice to have a Draft PR when not ready for review, as you mentioned in the PR title (so I went ahead and made it a Draft for you 👍 )

[k-a-webb]

@valeriupredoi, could you please help me understand why the pre-commit.ci check is failing?