Adds support for parametric vertical coordinate

[jasonb5]

Adds support for parametric vertical coordinates from CFConventions.

• Update docs
• Add name to CITATION.cff
• Remove squeeze

[dcherian]

Thanks for taking this on! I've left a few high-level comments. Mostly I think it would be a lot clearer if we define a dataclass per transform that took care of the all the specialized logic: #528 (comment)

[codecov]

Codecov Report

Attention: Patch coverage is 92.69231% with 19 lines in your changes missing coverage. Please review.

Project coverage is 93.35%. Comparing base (a9cebee) to head (c9849f6).
Report is 30 commits behind head on main.

Files with missing lines	Patch %	Lines
cf_xarray/parametric.py	92.91%	18 Missing ⚠️
cf_xarray/accessor.py	83.33%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #528      +/-   ##
==========================================
+ Coverage   85.78%   93.35%   +7.56%     
==========================================
  Files          13       13              
  Lines        2364     2197     -167     
  Branches      183        0     -183     
==========================================
+ Hits         2028     2051      +23     
+ Misses        303      146     -157     
+ Partials       33        0      -33     

Flag	Coverage Δ
mypy	?
unittests	93.35% <92.69%> (-0.64%)	⬇️

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[dcherian]

ignore the 3.9 failures, I'll drop it soon.

[dcherian]

Thanks! This is getting close. Just some style nits.

I haven't looked at the tests but I'm assuming you have it covered with some real life usage too? :)

[dcherian]

Please also add your name to CITATION.cff

EDIT: I added a checklist to the top.