Add documentation for Entry Processing (#9)

* Added documentation for Session

* Updated documentation for Session

* Added documentation for installation and basic operations

* Fix validation error

* Add documentation for querying and aggregation

* Add documentation for Entry processing and fix validation errors

Author: dhirupandey

docs/entryprocessing.rst

@@ -5,3 +5,33 @@
 
 Entry Processing
 ================
+
+An entry processor allows mutation of map entries in-place within the cluster instead of bringing the entire object
+to the client, updating, and pushing the value back.  See the `documentation <https://oracle.github.io/coherence/23.03/api/java/index.html>`_ for the processors provided by this client.
+
+Assume the same set of keys and values are present from the filtering and aggregation examples:
+
+.. code-block:: python
+
+    from coherence import NamedMap, Session, Filters, Aggregators, Processors
+    import asyncio
+
+        # ...
+
+        # targeting a specific entry
+        await map.invoke("0001", Processors.extract("age"))
+        # returns: 38
+
+        # targeting all entries
+        await map.invoke_all(Processors.extract("age"))
+        # returns: [["0001", 38], ["0002", 56], ["0003", 48]]
+
+        # incrementing a number 'in-place'
+        await map.invoke_all(Filters.greater("age", 40), Processors.increment("age", 1))
+        # returns [["0002", 57], ["0003", 49]]
+
+        # update a value 'in-place'
+        await map.invoke("0001", Processors.update("age", 100))
+        # returns true meaning the value was updated
+        await map.get("0001")
+        # the value will reflect the new age value