Add ILAMB standard analysis

[nocollier]

Description

Adds the ILAMBStandard Metric to the ILAMB provider that runs our standard analysis. A few comments:

• ILAMB works in 2 phases. The first of those operates on all pairs of (reference_data, model output) for any given variable. This generates some intermediate files containing scalars we want to show (errors and scores, etc) as well as things we want to plot (netcdf file).
• In a second phase, we take all this intermediate data and now can compute plot limits and make plots/generate html.
• For now, I have lumped phase 1 and 2 in the same Metric.run().
• ILAMB specific reference data has been added as a DataCollection via a pooch registry. This already addresses ILAMB-specific reference datasets #69.
• For the moment, this will only perform the bias component of the analysis. Need to expand ilamb3 once this interface is completely ironed out.
• I have some un-merged work on ilamb3 currently that is needed to make Phase 2 work completely.

Checklist

Please confirm that this pull request has done the following:

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

[lewisjared]

I have some un-merged work on ilamb3 currently that is needed to make Phase 2 work completely.

FYI: You can use a branch as a dependency https://docs.astral.sh/uv/concepts/projects/dependencies/#git

[nocollier]

This now implements the full metric. I have downloaded some local (historical/land-hist) data to illustrate the grouping works correctly. I get the following when I run ref --solve:

/home/nate/.config/cmip_ref/tmp/ilamb/
└── ilamb_standard_tas_cru4.02
    ├── 6cdca8780b5d843db6900e05fecdea14b4e82358
    │   ├── CanESM5-r1i1p1f1-gn.csv
    │   ├── CanESM5-r1i1p1f1-gn.nc
    │   ├── CanESM5-r1i1p1f1-gn_None_bias.png
    │   ├── CanESM5-r1i1p1f1-gn_None_biasscore.png
    │   ├── CanESM5-r1i1p1f1-gn_None_mean.png
    │   ├── CESM2-r1i1p1f1-gn.csv
    │   ├── CESM2-r1i1p1f1-gn.nc
    │   ├── CESM2-r1i1p1f1-gn_None_bias.png
    │   ├── CESM2-r1i1p1f1-gn_None_biasscore.png
    │   ├── CESM2-r1i1p1f1-gn_None_mean.png
    │   ├── output.json
    │   ├── Reference.nc
    │   └── Reference_None_mean.png
    └── a83768dcad7f86356ade937483bc9d409aa116bc
        ├── CESM2-r1i1p1f1-gn.csv
        ├── CESM2-r1i1p1f1-gn.nc
        ├── CESM2-r1i1p1f1-gn_None_bias.png
        ├── CESM2-r1i1p1f1-gn_None_biasscore.png
        ├── CESM2-r1i1p1f1-gn_None_mean.png
        ├── output.json
        ├── Reference.nc
        └── Reference_None_mean.png

which is the behavior I expected. I have many things still to polish but before the PR is ready I need to:

• Create some small tests
• Populate the cmec bundle

I just wanted you @lewisjared to see how I was going about the integration of the metrics.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Files with missing lines	Coverage Δ
...trics-ilamb/src/cmip_ref_metrics_ilamb/__init__.py	100.00% <100.00%> (ø)
...etrics-ilamb/src/cmip_ref_metrics_ilamb/example.py	100.00% <ø> (ø)
...trics-ilamb/src/cmip_ref_metrics_ilamb/standard.py	100.00% <100.00%> (ø)

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