add MediaLofi in kontor-gin (#97)

Co-authored-by: Thomas Peetz <thomas.peetz@cimt-ag.de>
Reviewed-on: #97

kontor-gin/internal/models/media_actor.go

@@ -31,6 +31,10 @@ type MediaActorDTO struct {
 	WebLink   string             `json:"url"`
 }
 
+type MediaActorAdd struct {
+	WebLink string `json:"url"`
+}
+
 func ConvertMediaActorsToDtos(actors []MediaActor) []MediaActorDTO {
 	dtos := make([]MediaActorDTO, len(actors))
 	for i, actor := range actors {