Add document for NewTopic and NewPartitions (#1101)

* Add document for NewTopic and NewPartitions

* group admin api

Author: jliunyu

docs/index.rst

@@ -40,16 +40,21 @@ Supporting classes
     - :ref:`TopicPartition <pythonclient_topicpartition>`
     - :ref:`ThrottleEvent <pythonclient_throttleevent>`
 
-    - :ref:`KafkaError <pythonclient_kafkaerror>`
-    - :ref:`KafkaException <pythonclient_kafkaexception>`
-    - :ref:`ConsumeError <pyclient_error_consumer>`
-    - :ref:`ProduceError <pyclient_error_producer>`
-    - :ref:`SerializationError <serde_error>`
+    - Errors
+        - :ref:`KafkaError <pythonclient_kafkaerror>`
+        - :ref:`KafkaException <pythonclient_kafkaexception>`
+        - :ref:`ConsumeError <pyclient_error_consumer>`
+        - :ref:`ProduceError <pyclient_error_producer>`
+        - :ref:`SerializationError <serde_error>`
             - :ref:`KeySerializationError <serde_error_serializer_key>`
             - :ref:`ValueSerializationError <serde_error_serializer_value>`
             - :ref:`KeyDeserializationError <serde_error_deserializer_key>`
             - :ref:`ValueDeserializationError <serde_error_deserializer_value>`
 
+    - Admin API
+        - :ref:`NewTopic <pyclient_admin_newtopic>`
+        - :ref:`NewPartitions <pyclient_admin_newpartitions>`
+
 Guide to the :ref:`Transactional Producer API <pythonclient_transactional>`
 
 
@@ -66,6 +71,24 @@ AdminClient
 .. automodule:: confluent_kafka.admin
    :members:
 
+.. _pyclient_admin_newtopic:
+
+**************
+NewTopic
+**************
+
+.. autoclass:: confluent_kafka.admin.NewTopic
+   :members:
+
+.. _pyclient_admin_newpartitions:
+
+**************
+NewPartitions
+**************
+
+.. autoclass:: confluent_kafka.admin.NewPartitions
+   :members:
+
 .. _pythonclient_consumer:
 
 ********