feat!: Add type name attribute to entity properties

The entity type name attribute of OSC XML can at the moment not be put into the entity properties: https://publications.pages.asam.net/standards/ASAM_OpenSCENARIO/ASAM_OpenSCENARIO_XML/latest/generated/content/Vehicle.html https://publications.pages.asam.net/standards/ASAM_OpenSCENARIO/ASAM_OpenSCENARIO_XML/latest/generated/content/Pedestrian.html https://publications.pages.asam.net/standards/ASAM_OpenSCENARIO/ASAM_OpenSCENARIO_XML/latest/generated/content/MiscObject.html

This MR introduces a new attribute and clarifies the usage of the model attribute.