Added Example 19 Sports and School Grounds

19_SportsAndSchoolGrounds/README.md

19_SportsAndSchoolGrounds/bolzschul.geojson

19_SportsAndSchoolGrounds/example19.py

19_SportsAndSchoolGrounds/output.png

19_SportsAndSchoolGrounds/poetry.lock

19_SportsAndSchoolGrounds/pyproject.toml

19_SportsAndSchoolGrounds/stadtbezirk.geojson

README.md