spin_off initial commit

conf/spin-off/expdef.yml

conf/spin-off/jobs.yml

conf/spin-off/parent_simulation.yml

conf/spin-off/spinoff_simulation.yml

namelists/spin-off/icon_atmopshere.namelist

templates/spin-off/adapt_member_utils.sh

templates/spin-off/adapt_parent_member.sh

templates/spin-off/adapt_spinoff_member.sh

templates/spin-off/prepare_parent_date.sh

templates/spin-off/prepare_parent_experiment.sh

templates/spin-off/prepare_parent_member.sh

templates/spin-off/prepare_parent_namelist.py

templates/spin-off/prepare_parent_runtime.py

templates/spin-off/prepare_spinoff_date.sh

templates/spin-off/prepare_spinoff_experiment.sh

templates/spin-off/prepare_spinoff_member.sh

templates/spin-off/prepare_spinoff_namelist.py