Add placeholder for contact export

src/fellchensammlung/management/commands/export_contacts.py

@@ -0,0 +1,10 @@
+from django.core.management import BaseCommand
+from fellchensammlung.tools.admin import export_orgs_as_vcf
+
+
+class Command(BaseCommand):
+    help = 'Export organizations with phone number as contacts in vcf format'
+
+    def handle(self, *args, **options):
+        export_orgs_as_vcf()
+