delete unfinished mesh-creation from master

...ressor_meshgeneration/00_resources/tfd_gwk_compressor.txt

examples/gwk_compressor_meshgeneration/Snakefile

examples/gwk_compressor_meshgeneration/casesettings.yaml

examples/gwk_compressor_meshgeneration/config.schema.yaml

examples/gwk_compressor_meshgeneration/development_run.py

ntrfc/preprocessing/mesh_creation/igg_mesh.py

ntrfc/preprocessing/mesh_creation/igg_meshcreator.py