Add query tx modes to docs

Author: vgvoleg

docs/apireference.rst

@@ -128,6 +128,39 @@ QueryTxContext (AsyncIO)
     :undoc-members:
 
 
+Query Tx Mode
+^^^^^^^^^^^^^
+
+.. autoclass:: ydb.BaseQueryTxMode
+    :members:
+    :inherited-members:
+    :undoc-members:
+
+
+.. autoclass:: ydb.QueryOnlineReadOnly
+    :members:
+    :inherited-members:
+    :undoc-members:
+
+
+.. autoclass:: ydb.QuerySerializableReadWrite
+    :members:
+    :inherited-members:
+    :undoc-members:
+
+
+.. autoclass:: ydb.QuerySnapshotReadOnly
+    :members:
+    :inherited-members:
+    :undoc-members:
+
+
+.. autoclass:: ydb.QueryStaleReadOnly
+    :members:
+    :inherited-members:
+    :undoc-members:
+
+
 ------------------------
 
 Table Service

ydb/query/__init__.py

@@ -1,10 +1,11 @@
 __all__ = [
+    "BaseQueryTxMode",
     "QueryOnlineReadOnly",
     "QuerySerializableReadWrite",
     "QuerySnapshotReadOnly",
     "QueryStaleReadOnly",
     "QuerySessionPool",
-    "QueryClientSync",
+    "QueryClientSettings",
     "QuerySession",
     "QueryTxContext",
 ]
@@ -20,6 +21,7 @@
 
 from .._grpc.grpcwrapper import common_utils
 from .._grpc.grpcwrapper.ydb_query_public_types import (
+    BaseQueryTxMode,
     QueryOnlineReadOnly,
     QuerySerializableReadWrite,
     QuerySnapshotReadOnly,