[feature] add mybatis-plus samples

[VampireAchao]

Summary

This pull request introduces a new MyBatis-Plus OceanBase sample, aiming to enhance the documentation and examples available for developers integrating MyBatis-Plus with OceanBase.

Solution Description

The solution includes the following key components:

1. Setup and Configuration: A detailed setup configuration for integrating MyBatis-Plus with OceanBase, including Maven dependencies and application configuration files.
2. Initialization Script: An updated init.sql script that not only creates necessary tables but also populates them with initial data for immediate testing and demonstration purposes.
3. Sample Application: A small Spring Boot application demonstrating the configuration and use of MyBatis-Plus to perform database operations such as read on the OceanBase database.

[CLAassistant]

All committers have signed the CLA.

[caifeizhi]

Thanks for your contribution @VampireAchao . And, please add new modules in .github/workflows/ci.yml and we can merge it after the new ci job passes; just like :#36

[VampireAchao]

@caifeizhi Done.

[whhe]

Sorry for the late response. The basic CI workflow of this repository is based on a run.sh file in every module, so please add it in your newly added directory.

[VampireAchao]

@whhe Thx for review,I've added the run.sh file in the newly created directory as advised.

[whhe]

Hi @VampireAchao, thank you for your update. The code is overall LGTM, but there is a little problem with the CI workflow. The current basic ci workflow already includes the step of starting a database container by default, so if you want to use testcontainers to manage the database container, you should set with_oceanbase_container to false in the ci configuration. You can check it at the readme file in repository root directory, and update it if necessary.

[VampireAchao]

Thx again, PTAL 👀

[whhe]

LGTM