[TH]: Load schools from geo portal

[k-nut]

Thüringen also proudly publishes their school locations on their Geoserver now. We should load it from there to get the geo location for the schools.

Start URL could be: https://www.geoproxy.geoportal-th.de/geoproxy/services/kommunal/komm_wfs?SERVICE=WFS&REQUEST=GetFeature&typeNames=kommunal%3Akomm_schul&srsname=EPSG%3A25832&VERSION=2.0.0

GetCapabilities: https://www.geoproxy.geoportal-th.de/geoproxy/services/kommunal/komm_wfs?REQUEST=GetCapabilities&SERVICE=WFS