Enhance MET to write gridded NetCDF data that follows the Climate Forecast (CF) convention

[dwfncar]

Describe the Enhancement

Enhance MET to write gridded and point NetCDF data that follows the Climate Forecast (CF) convention.
Modify the gridded NetCDF output format from gen_poly_mask, pcp_combine, grid_stat, ensemble_stat, and MODE to make it follow the gridded CF conventions.
Consider modifying the point NetCDF output format from pb2nc, ascii2nc, and madis2nc to follow the CF conventions for point data.

Time Estimate

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Define Related Issue(s)

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• [ ] METplus, MET, METdataio, METviewer, METexpress, METcalcpy, METplotpy

Enhancement Checklist

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[georgemccabe]

1407, #1840, and #660 may be related

[JohnHalleyGotway]

Discussed this at the Met Office METplus developer catchup meeting on Jan 25, 2024. The Met Office patches the NetCDF output from pcp_combine, but it would be preferable for MET to actually write CF-compliant output files directly.