[pyicon_dwd] first working commit with ICON-NWP outputs

config_ckdtree/config_ckdtree_r2b4_atm_dwd.py

config_ckdtree/config_ckdtree_r2b4_atm_dwd_datampi.py

config_ckdtree/config_ckdtree_r2b4_oce_dwd.py

pyicon/pyicon_IconData_dwd.py

pyicon/pyicon_IconData_dwd_datampi.py

pyicon/pyicon_plotting.py

pyicon/quickplots/pyicon_quickplots.py

pyicon/quickplots/qp_driver.py

pyicon/quickplots/qp_driver_dwd.py

pyicon/quickplots/qp_driver_dwd_datampi.py

tools/conda_act_dwd_pyicon_env.sh

tools/run_qp_driver_atm_dwd.sh

tools/run_qp_driver_atm_dwd_datampi.sh

tools/run_qp_driver_oce_dwd.sh