feat: Add child orgs to org detail page

src/fellchensammlung/models.py

@@ -233,6 +233,9 @@ class RescueOrganization(models.Model):
         self.exclude_from_check = True
         self.save()
 
+    def child_organizations(self):
+        return RescueOrganization.objects.filter(parent_org=self)
+
 
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 # Moderators can make moderation decisions regarding the deletion of content