Adding urban development to the trunk CABLE urban branch

[jiachenluMet]

CABLE

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• Bug fix
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[ccarouge]

@jiachenluMet we don't want or need a PR to bring your work from your fork into the CABLE repository. If you want I can bring the work over and then you can work directly within the CABLE repository and not your fork. Is that ok with you?

I would also like the branch "CABLE-Urban" to be renamed. Because the urban work is way too big to bring in one go. What is the first aspect you are working on? Is it still about bringing urban relevant surface parameters?
Actually could you start by opening an issue about what you are doing and we can see there what the first step is about.