Proto commits in smart-doc-group/smart-doc-example-cn

These 2 commits are when the Protocol Buffers files have changed:

Commit:19bd0a1
Author:linwumingshi
Committer:linwumingshi

feat(proto): :sparkles: add new protobuf messages and services - Add common User message in base/common.proto - Add MessageType enum in base/enum.proto - Define FileRequest and FileResponse messages in fileRequest.proto - Create EmailService with SendEmail and ListEmails methods in email_service.proto - Add Email message in mail.proto - [smart-doc #1116](https://github.com/TongchengOpenSource/smart-doc/issues/1116)

The documentation is generated from this commit.

Commit:83778e0
Author:linwumingshi

feat(proto): :sparkles: Generate proto files for TestOne and TestTwo services Add new protocol buffer definitions for TestOne and TestTwo services, including message types, enums, and service RPC methods. This update introduces the grpc communication framework for these services.