Add BB4CMIP processing

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• Add CEDS processing #26

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@chrisroadmap first question for you, where did NMVOC come from? There are no NMVOC_bulk files for BB4CMIP (unlike CEDS) on ESGF as far as I can tell, should we be using higher alkenes or something instead or am I missing something?

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@jkikstra this should at least run for you if you want to test just making it go

[chrisroadmap]

@chrisroadmap first question for you, where did NMVOC come from? There are no NMVOC_bulk files for BB4CMIP (unlike CEDS) on ESGF as far as I can tell, should we be using higher alkenes or something instead or am I missing something?

they exist but hard to find, listed under "Multiple" in ESGF

• https://esgf1.dkrz.de/thredds/dodsC/input4mips/CMIP6Plus/CMIP/DRES/DRES-CMIP-BB4CMIP7-1-0/atmos/mon/NMVOC_bulk/gn/v20241014/NMVOC_bulk_input4MIPs_emissions_CMIP_DRES-CMIP-BB4CMIP7-1-0_gn_175001-189912.nc
• https://esgf1.dkrz.de/thredds/dodsC/input4mips/CMIP6Plus/CMIP/DRES/DRES-CMIP-BB4CMIP7-1-0/atmos/mon/NMVOC_bulk/gn/v20241014/NMVOC_bulk_input4MIPs_emissions_CMIP_DRES-CMIP-BB4CMIP7-1-0_gn_190001-202212.nc

In my PR, hopefully I remembered to stick a note in the README in the GFED BB4CMIP directory instructions for download

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Legend thanks mate

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This one should be ready to go once you're done with #26 @jkikstra

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Hmm to get the percentage from boreal forest vs. peat vs. temporal forest we'll need to download those files too and process slightly differently. I don't know how much IAM teams care about the breakdown of biomass burning vs. the totals (we don't care for our emulators, at least not to first order).

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Given updates in #26, don't bother reviewing this until I've had a chance to rebase.

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Good to go here @jkikstra