PYTHON-5303 Add missing gridfs synchronous init file

gridfs/synchronous/__init__.py

@@ -0,0 +1,42 @@
+# Copyright 2009-present MongoDB, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""GridFS is a specification for storing large objects in Mongo.
+
+The :mod:`gridfs` package is an implementation of GridFS on top of
+:mod:`pymongo`, exposing a file-like interface.
+
+.. seealso:: The MongoDB documentation on `gridfs <https://dochub.mongodb.org/core/gridfs>`_.
+"""
+from __future__ import annotations
+
+from gridfs.errors import NoFile
+from gridfs.grid_file_shared import DEFAULT_CHUNK_SIZE
+from gridfs.synchronous.grid_file import (
+    GridFS,
+    GridFSBucket,
+    GridIn,
+    GridOut,
+    GridOutCursor,
+)
+
+__all__ = [
+    "GridFS",
+    "GridFSBucket",
+    "NoFile",
+    "DEFAULT_CHUNK_SIZE",
+    "GridIn",
+    "GridOut",
+    "GridOutCursor",
+]