geogebra element #901

GeoGebra is a popular application among mathe teachers. Currently you have to use an external hosting service like geogebra.org and the embed element. But it would be great if we could have an independent geogebra element. It should be possible, by using the geogebra JavaScript library. See: https://geogebra.github.io/docs/reference/en/GeoGebra_Apps_Embedding/