pycopancore reduced to core

[jnnsbrr]

This PR includes 2 major parts:

General changes to pycopancore

• replaced relative imports with absolute ones for better overview (https://peps.python.org/pep-0008/#imports)
• includes some commits also of @mensch72 that did not make it into the master but in the the fork and couple_lpjml branch
• debugging of both previous bullet points
• model_logic was made more flexible for missing processes, process_taxa
• I did not change the functionality of copan:CORE, just made it more flexible for alternative usages

pycopancore split into additional repositories ...

pycopan_more

• all components that are not the core (base, etc.)
• all models
• all studies

pycopanlpjml new

• lpjml component
• relies on pycoupler and pycopancore
• simplified syntax, structure compared to pycopancore

inseeds new

• inseeds components (farmer_management, base)
• models (farmer_management)
• simplified syntax, structure compared to pycopancore

[jnnsbrr]

@mensch72, @zugnachpankow and @hannah-pra can you please review the code within the next weeks? This should be merged soon.