Merge branch 'pickling_pr' into 'main'

eval/plot_shared.py

split_into_files.py

src/decentralizepy/communication/TCP.py

src/decentralizepy/datasets/Dataset.py

src/decentralizepy/mappings/Linear.py

src/decentralizepy/mappings/Mapping.py

src/decentralizepy/node/Node.py

src/decentralizepy/sharing/PartialModel.py

src/decentralizepy/sharing/Sharing.py