intitial project structure

I propose to set up a file tree similar to this

schema/base_scicat_dataset.yaml
schema/base_typedefintions.yaml
schema/base_...

schema/common_scientific_metadata.yaml
schema/common_sample.yaml

schema/technique_...yaml

schema/beamline_p08.yaml
schema/beamline_....yaml

scripts/generate_json_schema.sh
scripts/generate_schema_sheets.sh
scripts/...