ENH: add function for convenient insert

include/caosdb/connection.h

@@ -163,5 +163,19 @@ public:
   void operator=(ConnectionManager const &) = delete;
 };
 
+template <class InputIterator>
+auto InsertEntity(InputIterator begin, InputIterator end) noexcept -> int {
+  const auto &connection = caosdb::connection::ConnectionManager::GetDefaultConnection();
+  auto next = begin;
+  auto insert_transaction(connection->CreateTransaction());
+  while (next != end) {
+    auto insert_transaction = connection->CreateTransaction();
+    insert_transaction->InsertEntity(&next);
+    auto insert_status = insert_transaction->Execute();
+    next = std::next(next);
+  }
+
+  return 0;
+}
 } // namespace caosdb::connection
 #endif