add a example for mybatis, format markdown

[xiaoyekanren]

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[Copilot]

Pull Request Overview

This PR adds a complete MyBatis Generator example under examples/mybatis-generator, updates the example project’s POM and resource includes, and corrects markdown fences in the primary README files to use XML highlighting.

• Reformatted code fences in mybatis-generator/README.md and mybatis-generator/README-zh.md from java to xml.
• Introduced example MyBatis config files, mapper XML, Java model & mapper interfaces, and a Main.java demo.
• Updated examples/mybatis-generator/pom.xml with needed dependencies and resource settings, and improved example README to reflect the new setup.

Reviewed Changes

Copilot reviewed 11 out of 11 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
mybatis-generator/README.md	Changed snippet fences to XML for pom configuration
mybatis-generator/README-zh.md	Same fence fix for Chinese README
examples/mybatis-generator/src/main/resources/mybatis-config.xml	Added core MyBatis configuration
examples/mybatis-generator/src/main/resources/generatorConfigByExample.xml	Added “by example” generator configuration
examples/mybatis-generator/src/main/resources/generatorConfig.xml	Updated classPathEntry placeholder and added table flag
examples/mybatis-generator/src/main/java/org/apache/iotdb/mybatis/plugin/xml/MixMapper.xml	Added mapper XML for Mix entity
examples/mybatis-generator/src/main/java/org/apache/iotdb/mybatis/plugin/model/Mix.java	Added Mix model class with Swagger schema annotations
examples/mybatis-generator/src/main/java/org/apache/iotdb/mybatis/plugin/mapper/MixMapper.java	Added mapper interface for Mix
examples/mybatis-generator/src/main/java/org/apache/iotdb/mybatis/Main.java	Demo application for insert/select/delete/batch
examples/mybatis-generator/pom.xml	Added MyBatis, Lombok, Springdoc, IoTDB-JDBC dependencies and resources
examples/mybatis-generator/README.md	Updated SQL snippet, generator instructions, and output file list

Comments suppressed due to low confidence (3)

examples/mybatis-generator/README.md:110

• The README lists MixExample.java as an output, but that file isn't included in this example. Consider removing it or clarifying that it's generated at runtime.

org/apache/iotdb/mybatis/plugin/model/MixExample.java

examples/mybatis-generator/src/main/resources/generatorConfig.xml:21

• This placeholder path needs to be replaced by the actual JAR location in user projects. Please document that /path/to/iotdb-jdbc.jar is meant as an example.

<classPathEntry location="/path/to/iotdb-jdbc.jar"/>

examples/mybatis-generator/README.md:64

• [nitpick] Consider labeling the SQL block with ```sql for syntax highlighting clarity instead of a generic code fence.

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