Add support to load global forcing data

[BSchilperoort]

This PR adds support for selecting a latitude + longitude to run STEMMUS_SCOPE globally.

• Forcing data is generated from ERA5 + other data sources
  • LAI and landcover are still TODOs. Both currently are assigned dummy values.
• Soil intial conditions are generated from ERA5-land data. (See STEMMUS_SCOPE #143)
• Instructions on how to download the data is included in this PR

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[SarahAlidoost]

@BSchilperoort I finished the review, see also comments on the downloading_global_data.md. The failed test is related to

FILE: ./docs/index.md
[✖] https://github.com/EcoExtreML/STEMMUS_SCOPE
[✓] installation_instructions.md

2 links checked.

ERROR: 1 dead links found!
[✖] https://github.com/EcoExtreML/STEMMUS_SCOPE → Status: [40]

In ./docs/index.md file where:

<!-- markdown-link-check-disable-next-line -->
The model source code, executable file and utility files are available in the
[STEMMUS_SCOPE repository](https://github.com/EcoExtreML/STEMMUS_SCOPE).

The text is split into two lines and hence, themarkdown-link-check-disable-next-line does not work.

[BSchilperoort]

the forcing files from the Plumber2 follow ALMA convention

Well, they kind-of do. From how I interpret the document, the "reference height" is supposed to be a dimension. The document (from 2002) does not contain a lot of information to actually definitively say how to structure the netCDF, how to name dimensions/coordinates, etc. Surface elevation isn't even mentioned.

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0 Bugs
0 Vulnerabilities
0 Security Hotspots
4 Code Smells

92.5% Coverage
0.0% Duplication