[type:refactor]Decouple apidoc module from rule and selector modules

[478320]

Description

decouple apidoc module from rule and selector modules, link https://github.com/apache/shenyu/issues/5623

Make sure that:

Task List

• [X] You have read the contribution guidelines.
• [X] You submit test cases (unit or integration tests) that back your changes.
• [X] Your local test passed ./mvnw clean install -Dmaven.javadoc.skip=true.