CMIP7 ScenarioMIP harmonisation

[znichollscr]

Description

@mzecc take a look. I think this only needs docs and a changelog then we could merge...

Checklist

Please confirm that this pull request has done the following:

• Tests added
• Documentation added (where applicable)
• Changelog item added to changelog/

[codecov]

Codecov Report

❌ Patch coverage is 58.13953% with 18 lines in your changes missing coverage. Please review.
✅ Project coverage is 78.26%. Comparing base (e3053d9) to head (be4cbba).

Files with missing lines	Patch %	Lines
src/gcages/cmip7_scenariomip/harmonisation.py	41.93%	18 Missing ⚠️

❗ There is a different number of reports uploaded between BASE (e3053d9) and HEAD (be4cbba). Click for more details.

HEAD has 6 uploads less than BASE

Flag	BASE (e3053d9)	HEAD (be4cbba)
	7	1

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #44      +/-   ##
==========================================
- Coverage   83.78%   78.26%   -5.53%     
==========================================
  Files          26       27       +1     
  Lines         876      842      -34     
  Branches       81       83       +2     
==========================================
- Hits          734      659      -75     
- Misses        119      163      +44     
+ Partials       23       20       -3     

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[znichollscr]

Superseded by #45